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The Quantum Door

(The Quantum Worlds #1)

3.76  ·  Rating details ·  115 ratings  ·  45 reviews
Discover what lies beyond the Quantum Door.

The mysterious woods behind Brady and Felix's house have been deserted for years. But things change when a fence goes up and the brothers notice strange things happening at night. From the moment they dare cross the fence, the brothers enter a world of dark technological secrets that will rock the foundation of everything they kn
Kindle Edition, 255 pages
Published August 14th 2015
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Average rating 3.76  · 
Rating details
 ·  115 ratings  ·  45 reviews

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Disclaimer: I was sent a copy of this book by the author, Johnathan Ballagh, for an honest review

Opinion: Ahhh...sweet, sweet satisfaction. Usually, I stay far FAR away from any kind of book that involves sci-fi and quantum physics and such. I’m not a rocket scientist here guys, and I have no problem admitting that I just don’t understand what those black holes and “plasma snatcher do-hickie” things are all about. However if you gave me a book like this every day, I would sign up to be Captain b
Kimberly Vanderbloom
Sep 23, 2015 rated it really liked it
The cover and the title is what peeked my interest. The illustrations throughout the book were eye catching and beautifully designed. In the beginning the author captures the innocence and curiosity of two boys. Felix and Brady steal your heart and never let it go. There is a message of brothers sticking together which makes your heart melt. The concept of the Quantum Door was well defined and easy to understand. Nova was an interesting character who I adored. I loved how well developed she was. ...more
Cherry (_forevermint)
Nov 17, 2015 rated it really liked it
Fast-paced with vivid descriptions and nonstop action, The Quantum Door takes readers on an adventure in a world where technological advances abound and doors don’t just lead to another room. Brady (14) and Felix (12) are brothers on a mission when they defy the “No Trespassing” signs on the chainlink fence that separates their backyard from the unknown of the woods beyond.

Jonathan Ballagh weaves a tale of dangerous adventures, mysterious other worlds and an unbreakable bond between two brothers
Eamon Ambrose
Oct 06, 2015 rated it it was amazing
Suitable for early teens upwards, Jonathan Ballagh's debut The Quantum Door is the story of two brothers Brady and Felix, who happen to venture onto their neighbour's land and discover a gateway to a huge adventure filled with technological marvels.
After rescuing a young girl, Nova and her robotic dog Achilles, the brothers find themselves wrapped up in a complicated scenario involving everything from rogue robots to all-powerful AI beings and all manner of strange and wonderful creatures they
Mar 09, 2016 rated it really liked it
Exceptional work from one of my new friends in the independent author arena. This is a can't miss effort folks!! Well communicated, ORIGINAL storytelling. Crisp, interesting characters, and just....a wild fun ride. I highly recommend Jonathan's book. ...more
Wendy F
Jan 26, 2017 rated it liked it
Shelves: 2017
Really unique and not at all what I was expecting. I'm really glad I had the opportunity to read and review this one!

Read the full review at Birdie Bookworm.
Jan 27, 2020 marked it as to-read
Shelves: freebie
🎁 The Quantum Worlds Series (2 book Series) is FREE on Amazon today (1/27/2020)! 🎁
Sep 27, 2015 rated it really liked it
Hold on to your hats for a quantum ride!

Synopsis: Brady and Felix are two brothers whose lives will forever change when they venture over the chain link fence that surrounds the neighboring property. The No Trespassing signs posted along the fence are like neon lights saying, ‘Look over here!’ What twelve-year-old boy (Felix) could resist that temptation? And what about the blue lights Felix is sure he saw?

Felix and his older brother, Brady, send in a drone to explore the property, and the drone
Phillip Stephens
Jan 31, 2016 rated it really liked it
A Delightful Snack for Young or Old

At first glance The Quantum Door looks like a YA novel, but adult readers will should steal it from their kid's book shelf and spend a couple of evenings with it too. The story reads like an roller coaster, a little slow on the ride to the first crest but once you hit that peak the thrills twist and turn.

Latchkey brothers Brad and Felix live for video games and pizza while their mother works multiple jobs. Brad also spends his days keeping his electronics whiz
Dec 11, 2016 rated it really liked it
Read it on my blog
The Quantum Door is a superb science fiction novel aimed towards the Young Adult audience. Brothers Brady and Felix discover a gateway to another dimension on their neighbour's land. After passing through, they rescue a young girl called Nova and her robotic dog Achilles. They encounter a whole host of dastardly AI adversaries in the ensuing adventure to return home safely. The Quantum Door is a captivating, imaginative story with a theme of camaraderie in the face of adversity
Review is also available on my blog The Shameful Narcissist Speaks.

This was a decent mid-grade/YA science fiction novel with excellent pacing, non-stop action, and relatable characters. Often when you have two (especially same gender) sibling characters, their descriptions will start to run together, but this wasn't the case with Brady and Felix. The older Brady is more cautious and a bit shier, while his younger brother Felix is bolder, almost reckless, and an inventive genius.

The story reminde
Mar 13, 2017 rated it really liked it
The Quantum Door is a middle-grade fantasy/sci-fi type story that, while written for kids around the ages of 8-14, can be enjoyed by adults as well.

The story definitely reminded me of an episode of Are You Afraid of the Dark, even though I'm not sure why. The episode I'm remembering had to do with aliens and a TV set that kept turning on. It also reminded me of something you might see in an episode of Doctor Who. But one of the scarier episodes, not one of the campy ones. And, like, if the Dale
Allen V. Beal
Jun 21, 2017 rated it really liked it
Real cool read

Although it was written for "tweens", I really enjoyed it! The story grabs you at the beginning and draws you along. You have no choice..... lol
Joshua Hair
Jan 27, 2018 rated it really liked it
I was pleasantly surprised by Quantum Door. I got lucky and found a signed copy on eBay so I decided to take a chance. Mister Ballagh does a pretty good job of keeping his readers entertained and engaged. The story moves along at a pace that encourages young readers to finish that next chapter. Overall, I think it was an excellent start to a new author and will share it with my wife's classroom in the hopes that it will help a young one learn to love reading. ...more
Dec 01, 2020 rated it really liked it  ·  review of another edition
quick read, good story
Nov 03, 2019 rated it it was amazing
Can this day get any worse??

Never, ever say that! These kids get into more trouble than you'd ever expect! This is a wonderful YA fantasy with lessons on trust, friendship, and learning to love your life, even when it seems hopeless. It's a beautifully crafted story with plenty of mystery & excitement.
I'd recommend it for ages 12 and up.
Heiðrún Ósk
Apr 01, 2020 rated it really liked it
A bit long but worth the read nonetheless
I was provided an electronic copy of this book by the author in exchange for an honest review.

Before we start, can we please take a minute to admire the cover of this book? Because I think it's awesome. Now that that's out of the way, let's get to this review, shall we?

So, this book follows two brothers on their adventures as they get new neighbours and all sorts of crazy stuff starts happening. It starts with simple stuff, like power outages and strange things happening to their technology, an
Lindsay (LindsayHWrites)
Dec 18, 2015 rated it really liked it
Review originally posted here: [Edited to add information such as Genre. I was provided a paperback copy in exchange for an honest review.]

Rating: 4 Stars

Age Recommendation: Probably directed at children aged 10-15, but with the level of science involved, any young adult readers could appreciate the plot

Genre: Science-fiction, Coming-of-Age, Action and Adventure


" 'I always feared this would happen. You know that the door leaves a signature behind it.
Today We Did
Jan 11, 2016 rated it really liked it
Shelves: reviewed
Today We Did
A large swathe of woods stands on an abandoned property behind the house where teenage brothers Felix and Brady live. When a tall chain-link fence is erected along the boundary line the boys’ interest in the woods is piqued. They try to explore the woods using Felix’s remote control quadcopter, discovering something strange among the trees. An huge metal dog with glowing red eyes and a dark-haired girl appear through a fiery portal. The boys quickly remove themselves from the woods a
Elizabeth Peterson
Dec 14, 2015 rated it really liked it

Genre: YA, Sci-fi

Brady and Felix have lived outside of a forbidden forest for as long as they can remember, but when a mysterious new neighbor moves in and fences spring up around the forest overnight, their curiosity knows no bounds. When the strange lights start appearing in the forest too, they feel it is their duty to investigate. There is no turning back--especially when they find themselves called upon to help save the life of their mysterious new neighbor. Entering the forest plunges them
Lauren Jones
Oct 31, 2015 rated it it was amazing
Brady closed his eyes, balled his fists tightly, and walked toward the portal. As he took his first step into the light, he expected to be whisked along a celestial tunnel through the stars. But he never left the ground. Instead, he felt a slight pressure that pushed ever slightly against his skin like an invisible membrane. And then the sensation was gone—the bubble had burst.

Portals, robots, danger, oh yes…an entire multiverse is waiting within these pages. What could possibly be any better th
Jan 30, 2017 rated it really liked it  ·  review of another edition
Plot: The plot was unique and enjoyable. Ballagh created an interesting world in The Quantum Door in which parallel universes existed, and the world-building was good. Because the characters did not actually travel to a different world, the reader is able to visualize earth but with some differences. There was a lot of mystery in this story, and the revelations and twists were ones that I, someone who does not frequently read sci-fi, thought were unique and unexpected. Because this story is writ ...more
Erika Winterlia
Oct 09, 2015 rated it really liked it
The Quantum Door by Jonathan Ballagh is a very interesting novel placed partly in a unique and intriguing alternate reality. I enjoyed reading about this other dimension where earth was full of machines and artificial intelligence and I think the author did an amazing job describing all of the technical aspects very nicely. There were a lot of new words and things that I had never encountered before, but I never felt confused about any of it because it was introduced in a very clear way.

The sty
Marian Thorpe
Nov 08, 2015 rated it it was amazing
The door into another world is as old as Alice in Wonderland and as new as Neil Gaiman's Coraline, with many many interpretations and reiterations in between (and since). In The Quantum Door, Jonathan Ballagh's debut novel, it is given a familiar yet fresh treatment in this middle-grades science fiction story set a very few years in the future.

Brothers Brady and Felix are attracted by a faint light in the forest behind their Vermont home, a forest that has recently been purchased and fenced with
Nov 15, 2015 rated it really liked it
So I was excited to read this, it had me intrigued first of all by the fence. OK so that may sound a little strange but a barrier of any kind is a great thing in my eyes, is it keeping something in or is it keeping someone out?

The Quantum Door is the story of two young brothers, Brady and Felix who live in the country with their mother.

Their house is remote but it borders another property and when the owners change hands a fence appears, Brady and Felix are still in their early teens so of cour
Just Commonly
Mar 01, 2016 rated it really liked it
Light and darkness within the fenced in forest. Ready to explore?

In Quantum Door by Jonathan Ballagh, we're introduced right off the bat to Brady and Felix and their strange neighbors' vast property. And within pages, the strange neighbors moved, the property up for sale, and then mysteriously, a fence surrounding the entire property showed up. Not only the fence, but strange things like frequent power outages have sparked the boys' curiosity, and open a whole world of adventure for them and for
Oct 23, 2015 rated it really liked it
Originally reviewed at The Cyborg Knight

Jonathan Ballagh is the author you have to read in self-publishing! The Quantum Door is a high quality debut that showcases Ballagh’s mature writing style in a dimension hopping story featuring two brothers in the near future science fiction thriller that gives the reader a glimpse into what modern day technology may look like in 20 to 30 years.

While The Quantum Door isn’t considered a YA book, the two school age protagonists slant the story towards a slig
Lisa Holloway
Nov 29, 2016 rated it really liked it
This was a really good book! The best part of the book was the unique worlds created by the author. I don't read many science fiction books, but I felt like these worlds were something new. The book was reminiscent of The Wizard of Oz and The Lion, the Witch, and the Wardrobe because in all three of these books kids enter another world and go on a magical adventure where they meet beings that could be either friend or foe. They have a mission to complete in this world before they return home.
Bobbie Stanley
Jan 31, 2017 rated it really liked it
For the most part, this was a pretty cute book. I've had mixed feelings about science fiction lately and I was nervous about this one. There were elements that I didn't completely love, but I liked the vast majority of the story. Personally, I found the lead characters rather difficult to connect with. I have noticed, though, that when the lead character is a teenage boy (who is not Harry Potter or Percy Jackson), I do have kind of a tough time connecting with them. It's not that Brady and Felix ...more
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