Goodreads helps you keep track of books you want to read.
Start by marking “OMEGA (Mackenzie Grey: Origins, #4)” as Want to Read:
OMEGA (Mackenzie Grey: Origins, #4)
Enlarge cover
Rate this book
Clear rating
Open Preview


(Mackenzie Grey: Origins #4)

4.33  ·  Rating details ·  1,053 ratings  ·  98 reviews
Bodies drained of blood are scattered around New York City. With a serial killer on the loose, Mackenzie Grey is obsessed with solving the murders. She dives into her work at the Supernatural Investigative Unit to forget about the events that dismantled her Pack a year ago. When the killer makes Kenz the target, she falls down the rabbit hole and discovers she has a lot mo ...more
Published August 11th 2017
More Details... Edit Details

Friend Reviews

To see what your friends thought of this book, please sign up.

Reader Q&A

To ask other readers questions about OMEGA, please sign up.

Be the first to ask a question about OMEGA

Community Reviews

Showing 1-30
Average rating 4.33  · 
Rating details
 ·  1,053 ratings  ·  98 reviews

More filters
Sort order
Start your review of OMEGA (Mackenzie Grey: Origins, #4)
Lillian ☁ Cloud 9 Books ☁
***** 4.75 Stars *****

Cannot be read as a standalone

Omega is now my favorite book in the series. Mackenzie Grey is still a bit disrespectful and full of attitude, but she has evolved into such a strong character. This story just has more of everything. More romance. More heartbreak. More evil. I couldn't put this down.

My only complaint would be the ending of the book. I dived into this thinking that this was the final book in the series. The last chapter made me feel a bit disappointed and emp
Sandra "Jeanz"
Aug 05, 2017 rated it it was amazing
As soon as I heard about this book being available to read I was eager to receive my copy to read and review. I've loved all the previous books in this series so far but this is the last in the series, so I wondered if it would live up to my expectations, and how would it end? Would it be such a final ending that the characters could never be revisited, or would the author leave us the reader still having to answer some of the many questions ourselves, leaving the possibility of a return i
Diane Lynch
Aug 11, 2017 rated it it was amazing  ·  review of another edition
OMEGA (Mackenzie Grey #4) by Karina Espinosa Karina Espinosa’s OMEGA was an amazing conclusion to the Mackenzie Grey series.  Mackenzie Grey is investigating a serial killing in New York for the Supernatural Investigative Unit (SIU).  Meanwhile, she is still suffering from the events the transpired with her pack and the Lunas.  This contemporary urban fantasy is suitable for adult audiences.
I loved this book.  Karina Espinosa continues to do an exceptional job with her plot and character develo
Diane Lynch
Aug 11, 2017 rated it it was amazing
Shelves: ebook
Karina Espinosa’s OMEGA was an amazing conclusion to the Mackenzie Grey series. Mackenzie Grey is investigating a serial killing in New York for the Supernatural Investigative Unit (SIU). Meanwhile, she is still suffering from the events the transpired with her pack and the Lunas. This contemporary urban fantasy is suitable for adult audiences.

I loved this book. Karina Espinosa continues to do an exceptional job with her plot and character development. Mackenzie is understandably struggling with
Jul 11, 2017 rated it it was amazing
um wow! That ending, I really love Kenzie and the world she finds herself into in this series. I am still on a book high and am sad to see this series end. I really enjoyed getting to new the characters, big and small. Karina is so detailed with her writing you can see the words and characters leap off the page at you. You can vividly see in your mind what's being written. I really love the way she ended this series, even if she did tear my heart out. With Omega I felt myself more drawn to Bash ...more
Aug 13, 2017 rated it it was amazing
This was an amazing ending to the series!! The way thos author goes into such detail in her stories is absolutely amazing!! In Omega Mackenzie and her team are after a killer that's targeting both humans and supernatural. But when one of the losses is personal a new team is brought in to take over. Will they be able to work together to catch the killer? You're gonna have to read the book to find out.

This book was given to me for free at my request and I provided this review voluntarily
How Can Something so Good End So Poorly

Let's start this review with a praise. The first three books were spectacular. It was so good I was ready to put it on my annual read list then ... this book happened. Perhaps I'm being unfair because, in many ways, this book is well written (if you ignore the editing mistakes) and enjoyable but I can't help but to compare it to the first three of this series and found it woefully wanting.

Her first three books were well crafted and well thought out developm
Aug 24, 2017 rated it really liked it  ·  review of another edition

The first start of the book is a major disappointment for me. Mackenzie is moon bound again and behaving like an idiotic waste of space and I had to stop myself from flipping through the pages in the hope that the story picked up steam and became interesting again. The beginning was drab, the middle pretty good but the ending could have been better. However the series as a whole was enjoyable to read.
L.P. Hidalgo
Aug 10, 2017 rated it it was amazing
The end of an Era

It is not often that I wait for books but in the case of the Mackenzie Grey series, it has been three years of intense devotion for this series. Sadly after years of intense battles, estranged friendships, and complete vulnerability; we have come full circle where Mackenzie returns home to New York City.

Omega is the last installment of the Mackenzie Grey series where we find Mackenzie at home licking her wounds after the battle for freedom of the Luna’s in Scotland. Dubbed t
Aug 03, 2017 rated it it was amazing
Omg this is the week, where it seems one day after another I am reviewing the final book of a series.

Just yesterday it was the last one for The Dark Romeo Trilogy by Sienna Blake and today I am saying farewell to my girl Mackenzie Grey!

I was heartbroken yesterday, and I am equally as much today too! Mackenzie holds a special place in my heart as one she is a badass and two well because she was my first lycan I really really loved!

I discovered the original trilogy back in April (so not that long
Maggie Vitela
Aug 13, 2017 rated it it was amazing
I think this release had me the most excited in a while for a new book. I fell for this main character who isn't really like anyone I have read in a long time. She is fresh. She is who she is. She accepts that. But with the weight of everything that has happened in the short amount of time that it has. The loss of friends, and people she never knew, as the past is shining lights on the future that was paved long ago. Somethings you just never can let go. And when you want to. How?

I love the fact
Apr 04, 2018 rated it it was amazing
Such a good end! I felt so completed by it even if the end cut off a bit early in my opinion. It still worked because everything had really been tied off excellently. I had my doubts at the beginning especially when I found out that Mackenzie had a huge backslide and was moon bound again. I did not expect that. I was also surprised by her not talking to Bash and Jonah and Lucien and Amy for so long! How?! How do you have this crazy epic moment in the third book and then go to nothing? That was h ...more
Aug 18, 2017 rated it it was amazing
The stunning conclusion to the series and decisively one of the top ten books I've read in 2017.

Mackenzie hasn't grown as much in the year since book three ended as I might've thought, in fact she really regressed. But with everything she'd been through in such a short time, it's understandable.

But despite, or perhaps because of, her regressions, self-recriminations, sarcasm and love for blaming everything bad on herself; she really grew a lot in this book. She was no longer as cocky but still
C. Erani Kole
Jan 12, 2021 rated it really liked it  ·  review of another edition
I can't believe it

This was GOOD, because you see a lot of the final war. It lead up to this and I'm glad there's A lot to take in.

In general, Mackenzie is a pain, and I struggled a little more in this one because of how she kept pulling away and there's only so much I can take. But eventually it paid off and she learned from it. I appreciate her thing with Sebastian because he's not too predictable. Obviously he is now because they're together but I also like that she didn't just go with him. Ev
Jan 17, 2018 rated it it was amazing  ·  review of another edition
Karina why do you kill me so!? My heart is literally broken!!! GAH!!!!

Firstly, I have to say that this isn’t the last book, according to Karina’s Facebook there will be 2 more separate Mackenzie series...I’m beyond excited to read those by the way... so for all the people who felt like this shouldn’t have been the ending, well it’s not, so chill.

Secondly, Can I just say this this book completed me? Like Mackenzie finally put on her big girl panties and decided she needed to deal with her ish! I
Linda Dolven
Sep 17, 2020 rated it it was amazing  ·  review of another edition
Very exciting

I couldn’t put it down and had to finish it before I fell asleep. There were a few things I didn’t like in the story... but they would be major SPOILERS. Main thing was, in vague terms, again Kenzie didn’t tell the person she wanted to cure that the cure would cost someone’s life. Had that person known, she would not have been interested in it and the other person would not have decided to sacrifice themselves for her. Plus she’s not going to take the cure anyways, probably, now tha

I really felt like the story was lacking. There was so much going on that it was overwhelming. A lot of the times things were stated that were never followed up on. An example being how MC was supposed to train and teach the Luna's who joined the Brooklyn pack but then we never saw that. There was also supposed to be the promise of some growth with her character development and yet it was two pages long and didn't hold much in the way of growth. She simply fell asleep had a dream woke up
Heather Russell
Aug 05, 2017 rated it it was amazing
What a wonderful end to the Origins series! Karina Espinosa has created a book that not only do you love the characters but gives you an emotional rollercoaster ride too!
Mackenzie Grey is in the Supernatural Investigative Unit. It’s up to her team to find a killer who is targeting humans and supernaturals, what the killer is and why the killer is doing this. When a team member is killed and said killer seems to know Mackenzie she’s pulled off the case. Add in a new team member and let the gam
Jul 29, 2018 rated it liked it
So I’ve had the luxury of reading these books back to back as if they were one novel and I can say that the author has created a really good and intriguing story line. Reading these books this way has also allowed me to see how the characters have developed over time without any gaps in between, with that being said most of the characters have developed in positive ways except Mackenzie Grey. She has become the most annoying character in this book. In a series, you expect characters to shift, ha ...more
Jul 28, 2019 rated it liked it  ·  review of another edition
I am so over MacKenzie! 3 stars.

Mackenzie's personality and self involvement really grates in this to the book's detriment. After 4 books a smidgeon of romance would help too. To me this was a slower book than the one's preceding it and it all led to a rather flat HEA.

Ms Espinosa has a lot going for her but she really needs to work on her ability to write emotion, her age appropriate characterisation and please, please, please - her use of idiom. Almost all the idioms used are incorrect, the sp
Oct 22, 2017 rated it really liked it  ·  review of another edition
Good read

This book is the fourth and last of the series. All books are mainly told from Kenzies POV. She is strong but always running away not able to deal with all the emotions. I didnt like that this book started a year after the 3rd book. In that year Kenzie fell apart literally. She lost everything. In the end one man was lost and the other became her soulmate. Not withstanding her soulmate never said he loved her but rather showed her. It would have been nice to read about their mating cere
Marie Pedrick
Jan 10, 2018 rated it it was amazing
I loved this fourth and sadly final book in the Mackenzie Grey series. This shifter series follows kenzie, a lone wolf, a Luna that doesn’t conform. If you like shifter books then this is definitely the series for you. I loved the fact that the hero in this series was female even in the male oriented world of werewolves. This book closes the story of kenzie, she goes from a lone wolf to making a pack of her own, the most unconventional pack you’ll ever see, a pack containing not only the king of ...more
Lynn's books
Jan 30, 2019 rated it it was amazing  ·  review of another edition
Wicked ending!

This series is awesome! It makes no excuses much like Mackenzie! Totally loved it! I was so taken with the revelation at the very very very end that I had to go back and read Ophelia's vision. Alexander, ranulf, Lucien, Amy, cas and all the rag tag pack characters I just love. Bash! I knew it! So pleased on that development! Jonah. My heart breaks. Not so much for how it ends as much as for the damage that was done. A tortured soul that now has peace.
See what this story does? It m
Chantelle Bouffanie
Jan 21, 2018 rated it it was amazing
Amazing!! I've volunteered to review this book for United Indie Book Blog. This is the fourth and last book in this series. This has been an amazing journey. I have loved watching this story unfold. Mackenzie is brash and out spoken but she will do whatever she can to save her friends. These book is not an standalone, you have to read each book from the first one. There's so much that could be said about this series but it also would spoil it too. So you just have to take get this series and rea ...more
May 28, 2018 rated it it was amazing
Shelves: 2018
Omega is the fourth and final book in the series. This book has yet another time jump, but it works to further the story. We have a majority of our answers at this point, but there are some important answers we are still missing. This story opens up and we get another very much changed Mackenzie. Honestly, I feel for her. She has had to go through so many different changes throughout this series. This book is the perfect conclusion to this wild trip we have been on. I think you will be satisfied ...more
Cathy P
Jul 11, 2018 rated it it was amazing  ·  review of another edition
Great conclusion to a great series

Everything comes full circle in this book. I laughed and I cried. Mackenzie met new allies and lost old friends, more Importantly she found herself.
In this book the fae queen starts a war with basically everyone. Starts out with Mackenzie working with SIU I to solve murders of both humans and paranormals. She is punishing herself and is in an extreme funk after all the loss in Scotland. I enjoyed the added romance to this book, though it's still a small part to
I typically don't re-read books/series. However, the characters and events of this series have stuck with me. I had this book on my backlog to read and wanted to make sure I remembered all events correctly. So I re-read the whole series one right after the other. I think this book was by far the best book of the series! I absolutely love Mackenzie and her pack. Mackenzie is a kick-ass, take action and apologize later kind of woman. There are a ton of awesome supporting characters in the series t ...more
Lori Jackson
Aug 22, 2019 rated it it was amazing  ·  review of another edition
She finally embraced herself! She accepted help after being stubborn and she was able to change the world again. After the Luna uprising and the changing up Lycan law, she has to lead every one against crazy Dru and Drew. I don't even know to take all that happened. I understand Jonah doing what he did, but why did it have to be him? If it hadn't been him, who would have done it? I am so happy that Amy and Lucian and Jackson love her again. I cannot wait to go into this next series and continue ...more
Debra Omiatek
Sep 12, 2019 rated it really liked it  ·  review of another edition
Mackenzie Battles the Fae Queen

The saga of Mackenzie reaches a climax in this book. She still has alot of self doubt and self pity. But she still cares about her friends and make shift family. Her relationship with her biological father changes as they face battles together. Her relationship with Amy at first appears to be lost but over time and with a common enemy it improves. The action is good. Mackenzie 's indeciviness can be tough to appreciate. Her ability to find her way seems like a seri
Shabnam Hosseini
Aug 04, 2017 rated it really liked it
I Loved this serie!! i was so glad that i didn't have to wait a year for this one to come out, to enjoy this one. I have to say it didn't dissapoint me!! I loved that you got to see a different side of Mackenzie and see how her mind works. i started reading this and just got into the book and didn't stop till it ended. it felt like i was watching a movie in my own head. i really liked the kickass scenes that were in there. i definiteley recommend this serie if you like a kickass heroine, vampire ...more
« previous 1 3 4 next »
There are no discussion topics on this book yet. Be the first to start one »

Readers also enjoyed

  • Forged by Fire (Blood & Magic #6)
  • Kissed by Fire (Blood & Magic #2)
  • Burned by Fire (Blood & Magic, #3)
  • Consumed by Fire (Blood and Magic, #5)
  • Branded by Fire (Blood & Magic, #4)
  • Cursed by Fire (Blood & Magic #1)
  • Hellcrossed (Raven Cursed #5)
  • Her Wolf's Demands: A Wolf Shifter Paranormal Romance (The Witch's Pack Book 2)
  • Wolf Hunted (Rejected Moons Book 1)
  • The Tracker’s Rage (Mate Tracker #3)
  • The Tracker’s Revenge (Mate Tracker #4)
  • Moon Tortured (Sky Brooks, #1)
  • Wicked Wolves & Tangled Truths (Blood and Magic: Hellbound, #1)
  • Alpha's Betrayal (Chosen By The Alpha, #1)
  • Rejection on the Full Moon (Rejection, #1)
  • Pack War (Their Shifter Princess #2)
  • Wolves' Queen (The Royal Heir, #1)
  • The Wolf's Witch (The Witch's Pack, #1)
See similar books…
Karina Espinosa is the Urban Fantasy Author of the Mackenzie Grey novels and The Last Valkyrie series. An avid reader throughout her life, the world of Urban Fantasy easily became an obsession that turned into a passion for writing strong leading characters with authentic story arcs. When she isn’t writing badass heroines, you can find this self-proclaimed nomad in her South Florida home binge wat ...more

Other books in the series

Mackenzie Grey: Origins (4 books)
  • Shift (Mackenzie Grey: Origins, #1)
  • Caged (Mackenzie Grey: Origins, #2)
  • Alpha (Mackenzie Grey: Origins, #3)

News & Interviews

  As dedicated readers already know, some of the best and most innovative stories on the shelves come from the constantly evolving realm of...
35 likes · 1 comments