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Deadly Cool (Deadly Cool #1)

3.88  ·  Rating Details  ·  5,089 Ratings  ·  728 Reviews
Hartley Grace Featherstone is having a very bad day. First she finds out that her boyfriend is cheating on her with the president of the Herbert Hoover High School Chastity Club. Then he’s pegged as the #1 suspect in a murder. And if that weren’t enough, now he’s depending on Hartley to clear his name.

But as much as Hartley wouldn’t mind seeing him squirm, she knows he’s
Paperback, 303 pages
Published October 11th 2011 by HarperTeen
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The Host by Stephenie MeyerFirelight by Sophie JordanDeadly Cool by Gemma HallidayNightshade by Andrea CremerShatter Me by Tahereh Mafi
best "eye" on the cover
3rd out of 707 books — 1,757 voters
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Best Cover Fall/Winter 2011
24th out of 408 books — 1,637 voters

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Community Reviews

(showing 1-30 of 3,000)
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Wendy Darling
How was it fair that I had to conduct a murder investigation and do trig?

If Nancy Drew had a cheeky sense of humor, she would be Hartley Featherstone. Hartley's boyfriend Josh has been cheating on her, and even worse, the girl turns up dead and Josh is now the prime suspect in Courtney's murder. What's a girl to do except band together with her best friend Sam and the good-looking Chase to try and solve the crime?

Reading Deadly Cool is like eating a bowl of ice cream. It's a refreshing treat fol
Apr 13, 2012 Giselle rated it really liked it
Shelves: contemporary
There are a ton of funny books out there, and sure, plenty have made me chuckle, but very few have made me laugh out loud. Deadly Cool is one of them. Add in an engaging mystery and a dash of romance, this is perfect for a fun, diverting read. It's exactly what I was in the mood for.

Hartley's cheating ex-boyfriend is the #1 suspect in a murder. Convinced it wasn't him, Hartley is determined to find the real killer. Besides, how can she kick his ass if he's in jail? If you know me at all, you kno
Dec 13, 2014 Ariana rated it it was amazing
Shelves: laugh-aloud, series

4.5 stars.
Hartley is definitely one of my favorite characters.
I love her 'excellent sarcastic wit', I like how she is so stubborn in trying to find the real killer and save her ex-boyfriend from jail, even though she does it mostly because she thinks it's her right (and only hers) to kick his ass and she would gladly do that.
"I immediately opened my window, checking outside to make sure Josh had a clear path. The last thing I wanted was for him to get hurt on his way to me killing him"

Now of
Nov 06, 2011 Kristi rated it really liked it
Can I haz that girls eyes, please?

This book was not what I was expecting. Usually when you think murder mystery, you think dark and scary. And while this book definitely had it’s creepy moments, I laughed and smiled through most of the novel.

This novel doesn’t have much depth, but that doesn’t necessarily make it a bad book. Sometimes those are just what a reader is looking for, and it’s exactly what I was looking for at the time! This book was fun! It’s entertaining and absorbing, and it will
Nov 06, 2014 Tabatha rated it it was amazing
Recommends it for: everyone!
You can find this review and other on my blog:

(view spoiler)

Hartley Featherstone life isn't all that peachy right now; not only is her boyfriend cheating on her, but when he's suddenly accused of murder, Harley somehow ends up having to prove his innocence..
Oh, and try not to killed trying.

This. Was. Amazing.

So, yeah... I really don't know where to begin. I loved this book! I fell in love with it when I added it to my to-read list on Goodreads, so when I casually walk
This review will also appear on my blog, Mindful Musings.

In a Sentence: Though I wasn't the biggest fan of the ending, Deadly Cool was a quick and fun read with a wonderfully loveable main character who will definitely have me reading the sequel.

My Thoughts

There are some days when I wish I had half-heart ratings because once again, I found myself debating over whether to give a book a three or a four. I finally settled on a three (mainly because of an issue I'll mention later), though it's a v
Nov 01, 2011 ♥Rachel♥ rated it really liked it
This was a cute mystery/romance with a Nancy Drew like feel. It was also pretty funny (I stayed up pretty late to finish this and had to keep it down with the cracking up because I didn’t want to wake my husband!)

The story opens up with Hartley, a junior in high-school breaking into her boyfriend, Josh’s locker to find out if the mornings text rumors are true: Josh has gotten up-close and personal with the president of the Chastity Club, Courtney Cline. In there she finds a girlfriends worst nig
Veronica Morfi
Jun 30, 2014 Veronica Morfi rated it really liked it
Rating: 4/5

I've been in the mood for YA mystery books lately, so it was only natural that I picked up Deadly Cool, since I owned it ever since it came out. In this book, Hartley finds out that her boyfriend is cheating on her and decides to confront him, but when she sneaks in his bedroom, instead of him she finds a dead girl, the girl he was cheating with. After that Hartley's world is turned upside down. The police is after her ex-boyfriend, the media is all over her and her whole school is ta
Mar 03, 2012 Sabrina rated it it was amazing  ·  review of another edition
I've just had a sleepless night because I had to inhale this book in one sitting.

And now where is book two, eh!?
*taps her foot impatiently*
Kristina Snyder
Dec 08, 2011 Kristina Snyder rated it really liked it
Shelves: books-i-own
I fell in love with this book!!!! I stayed up until four reading this, and then I had to finish it as soon as I woke up. This book was not what I was expecting at all. It even had me cracking up in several parts. I loved this romance/mystery novel.

Hartley hears rumors that her boyfriend is cheating on her with the president of the Chastity club, Courtney. She ends up finding an opened condom wrapper in his locker. Hartley and Sam, her best friend, head to Josh's house. They break in and find Co
Mimi Valentine
Nov 30, 2011 Mimi Valentine rated it liked it
Shelves: reviewed
Rating: 3.5

I don't know what it was about this book, but it called to me from the first time I discovered it. Maybe it was the cover-girl's gorgeous eyes (SO BLUE!) or my desire to be just like Nancy Drew when I grow up, but I knew I wanted to read Deadly Cool.

And it was so much lighter and fun-filled than I would've ever expected from a mystery! Even with the threat of unexpected deaths and trying to find the murderer, I found myself grinning constantly at Hartley's sarcasm and wit. Gemma Hall
Feb 13, 2012 Rachel rated it really liked it

My absolute favorite books to read are ones with great mystery. Mystery novels is one of my favorite genres because I love solving them and creating theories. I experienced an enjoyable Agatha Christie faze last year. (Where I was able to correctly guess some murders!) I find that the best murder mysteries contain confusing clues, logical solutions, relatable characters and plenty of twists. Deadly contained all that.

Deadly Cool by Gemma Halliday creates
2.5 stars

Gahhh! Such a...bland book.

Let's start with the good stuff. I maybe read Deadly Cool in two hours. Despite being fairly long, it's incredibly fast and pretty good fun. I'm a huuuuuge Veronica Mars fan, so a mystery in high school was right up my street. If you love mystery, and don't mind it being fairly light and fluffy, I would read this. However, maybe get it from the library instead of buying it? There's really no reread value in this one at all, and apat from Hartley's sparky voice
May 17, 2012 Isamlq rated it really liked it

How awesomely funny was this?

If at first she read sometimes shallow and with not that much to her, well... I was wrong. After a couple things happen to her, around her, her reactions were enough to get me to consider her more, and in the end, I say, I actually I do like this particular girl detective. Because this girl detective would likely give Sophie of Hex Hall fame a run for her money in snark. Well, that and the fact that her story is very straightforward in the telling and never d
Dec 14, 2011 JeanBookNerd rated it really liked it
Shelves: reviews
Gemma Halliday’s debut, Deadly Cool, was an addictive mystery novel. It was packed with fun twists, turns, and characters that are very appealing but non-irritating. I loved how Halliday showed great effort in leading the characters and then twisting it to something entirely different. Her writing style just made the reading more fun and exciting.

The story was very alluring with all the clues that Hartley uncovers. Halliday’s unique way of making her readers become part of the investigation was
Mary Catherine
Apr 16, 2011 Mary Catherine rated it really liked it
Hartley loved Josh.

Until she found out that Josh didn’t love her as much.

In fact, Josh cheated on her.

With the president of The Chastity Club.


So what else is a girl to do but confront the boy who is hiding from the girl because, well, rumors are spreading like wildfire in their high school?

Except when Hart enters his bedroom, she doesn’t find him.

She finds a dead president of The Chastity Club.

Now, Josh is the number one suspect and Hart is doing her own investigation to clear his name
Lydia Strope
Jun 06, 2014 Lydia Strope rated it it was ok
When I first started this book I wasn't sure how much I was really going to like it because its a murder mystery, and those aren't usually something that I read. BUT I am happy to say that it kept me on the edge of my seat and guessing the entire time! Unlike a lot of other heroines that are popular right now, Hartley was a different kind of heroine. She was a strong personality and not nearly as whiny as some other heroines.

In the beginning of the story it basically starts out with her finding
Mar 18, 2012 Katherine rated it liked it
RATING: 3.5 Out Of 5

The one thing that makes this novel is the humour. If it wasn't for the humour I would have stopped reading this cheesy, slightly childish-ly written novel. However I was laughing so often I just had to keep reading.

Great Funny quotes:

"Yeah? Well, at least my boyfriends not effing the president of the Chastity Club"

"We're censoring now"

"Hey, I'm already driving the getaway car. I might as well be a full-blown accomplice"

"If we can get on the roof, it'll be easy to c
Nov 23, 2011 Evie rated it really liked it
This review was originally published to Bookish Blog

320 pages of pure fun and entertainment - Deadly Cool is a pretty cool book indeed. It's a teen murder mystery told with a surprising lightness and sprinkled with some seriously hilarious teenage humor. Fast-paced and riveting, this book will both chill you and make you laugh out loud!

The story kicks-off with Hartley discovering a condom wrapper in her boyfriend's locker (FYI, Hart is still a virgin). And I know what you're thinking, but well,
Dec 28, 2011 Melissa rated it really liked it
In Love! This book is hilarious :) Some of the things Hartley says in this book KILL me! Along with some other people ;0. This is a MUST read! This book keeps you guessing throughout it all, and sometimes second guessing! Gemma writes about cheating boyfriends, murder, sometimes bad thoughts of ther super hot bad guy!, and a murderer in school!

She keeps you laughing throughout the whole entire book and my stomach hurt at the end in a good way.

I LOVE Hartley! She is an amazing charcter and you ju
Natalie (Natflix&Books)
I'm a fan of the breezy mystery. Those mystery novels that aren't just blood and guts, the ones that are also funny with a (usually female) spunky crime-solver. Deadly Cool fits this bill. It is the story of Hartley who finds out through the high school grape vine that her boyfriend, Josh, has been cheating on her--with the president of the chasity club. She goes to her house to confront him; breaking into his bedroom through the window when he doesn't answer the door. There she finds Ms. Chasit ...more
Aug 15, 2011 Ashley rated it it was amazing
Deadly Cool is a murder mystery with delightfully hilarious characters and a twisting plot. When it starts out, Hartley has just busted into her boyfriend's locker, and found something that's proof positive to the fact that he's a lying, cheating jerk. And with the president of the Chastity Club, no less! When she goes to confront Josh, she finds a dead body instead... Unfortunately, that's not the only dead body Hartley will find. Now her boyfriend--ex-boyfriend-- is a wanted suspect and on the ...more
Rating 3.5

Deadly Cool proves that murder and high school can be a killer combination. (:D heehehehehe)

Our story revolves around Hartley, your average teen girl turn Nancy Drew after her cheating boyfriend (Josh) is framed for murder when the body of his fling, the popular "chaste" Courtney Cline, turns up straggled in his bedroom.

The more I read Deadly Cool, the more I got into the story. The way that everything comes together from the who-done-it mystery to the characters involved was all extre
Mar 28, 2012 Tânia rated it liked it
Shelves: ebook
Step aside Nancy Drew, make way for Hartley Featherstone! Deadly cool is a murder mystery book, and while it had its darker aspects, with the bodies piling up around our dedicated teenage detective, it managed to be fun! Think twice before you leave a trail of bread crumbs behind you because, oh boy, is Hartley Featherstone intent on following those clues to solve a mystery!

I much prefer a darker and scary murder mystery book, but sometimes a quick and lighter read is always refreshing. Althoug
4.5 stars.

Humor. Wonderful, wonderful humor.

Basically, Hartley reminded me of Sophie from Hex Hall--which is a good thing, because I really, really loved Sophie. Snarkiness is a very nice trait to have in protagonists.I also liked how Hartley didn't feel the need to describe how hot Chase was every time she met him. Let's take a lesson from her, okay? One time's enough, people. Get on with the story.

Oh, and the story. Hmm...for a mystery that involves two murders, the book is surprisingly light-

Nov 16, 2011 Gabby rated it it was amazing
Shelves: own
Phenomenal! Yes, I used the word phenomenal to describe this book because it really is.Deadly cool takes you on a thrilling mystery through out the pages. You are left guessing who did it and honestly I did NOT see the ending coming.It was the last person I would have expected to do that.Maybe it was just me who was thrown off,but I really didn't guess this person. Than again, you know what they say the one you least expect is the one who always does it.
Now on to Harley,first of all what a cool
Oct 11, 2011 Andrea rated it really liked it
I'm smiling right now. I know, you can't see me. But trust me, I am. The reason for the big smile? This book, Deadly Cool. Based on the cover, which I adore, and the synopsis, you might think Deadly Cool to be a dark, serious book. And I'll admit, there are aspects to the book that are dark and serious. Such as, cheating boyfriends, murder, and a killer on the loose. But author Gemma Halliday told the story with a droll, quick-witted tone that absolutely knocked the ball out of the park.

I'll ad
Nov 25, 2011 ~Tina~ rated it really liked it
Deadly Cool was a really cute whodunit book. Great writing, loved the dialog. Awesome easy to like characters, Hartley, Sam and Chase are sensational and the plot was just tons of fun.
Really looking forward to Social Suicide!
I just want to start off this review by saying thank you to the author for giving Hartley a backbone!

At first I was a little bit skeptical, because Hartley was going through some major denial. She was making up really bad excuses for what her boyfriend, Josh Dupont, could have been doing with a condom wrapper in his gym locker… like he was doing a project with Courtney about sexual education and that’s why he had the condom wrapper.

However, she later came to her senses and realized that Josh wa
Deadly Cool is a fun, definitely not to be taken seriously, book that was an entertaining read, even if it was rather shallow. Not to mention that it relied on group generalizations and had the villain in the end vomit out all of the reasons as to why they did what they did, which was a truly spectacular face smacking moment.

Still, it's a book not to be taken seriously, and the author knows this. For a murder mystery, the book is rather light hearted. The characters sort of stumble along towards
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Crazy for Young A...: Deadly Cool by Gemma Halliday → Start Date: July 11th, 2015 7 12 Jul 15, 2015 03:09PM  
Quotes: Who said it? 2 17 Oct 05, 2013 02:49AM  
Couldn't they have found the...(SPOILERS) 9 79 Nov 30, 2012 05:21PM  
Teen Readers Book...: Discussion on pgs. 1-100 1 11 Apr 22, 2012 04:01PM  
Teen Readers Book...: Deadly Cool 1 7 Apr 22, 2012 03:53PM  
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Gemma had a hard time figuring out what she wanted to be when she grew up. She worked as a film and television actress, a teddy bear importer, a department store administrator, a preschool teacher, a temporary tattoo artist, and a 900 number psychic, before finally selling her first book, Spying in High Heels, in 2005 and deciding to be a writer.

Since then, Gemma has written several mystery novels
More about Gemma Halliday...

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Deadly Cool (3 books)
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