Everything I Thought I Knew

Book review by
Mandie Caroll, Common Sense Media
Everything I Thought I Knew Book Poster Image
Romance, science blend in emotional heart transplant tale.

Parents say

No reviews yetAdd your rating

Kids say

age 13+
Based on 2 reviews

Did we miss something on diversity?

Research shows a connection between kids' healthy self-esteem and positive portrayals in media. That's why we've added a new "Diverse Representations" section to our reviews that will be rolling out on an ongoing basis. You can help us help kids by suggesting a diversity update.

A lot or a little?

The parents' guide to what's in this movie.

Educational Value

Very general introduction to quantum physics, in particular the multiverse theory. Also, surface-level heart transplant-related medical content (need to take anti-rejection medication for life, life expectancy after transplant, etc.).

Positive Messages

Instincts are powerful clues as to what we need or deeply desire; listen to them and they will usually lead you where you need to go. Question the expectations adults and peers have for you; you must figure out for yourself what kind of a person you'll be and what career is best for you. Try your best not to be so wrapped up in your own problems that you aren't able to be a good friend to others; and when you are, own up to it and apologize. So many possibilities exist in the world; all you can do is make a choice and be open to what may come as a result.

Positive Role Models

Chloe shows how a destabilizing life event can cause a crisis of identity. While she makes some risky, and even dangerous, decisions, she learns from her mistakes and is able to grow as a person over the course of her story. Kai, Chloe's surfing instructor and crush, shows great kindness and care towards Chloe, and also provides her a refuge from her tumultuous inner life in surfing. Chloe's new friend Jane is brash, funny, and a bit wild, but is trying to become a more responsible person. In terms of representation, Chloe and Jane present as White, while Kai is biracial White and Japanese, and Jane's love interest is a girl.


Aside from nightmares about a motorcycle crash, where there's a fair amount of blood, there's no violence. Although, Chloe has a couple scary experiences while surfing (knocked out and trapped under a wave) and drives dangerously fast on a motorcycle.


Chloe laments that without a heart transplant she may die a virgin. A couple intense make-out scenes between opposite gender characters.


Occasional swearing, including "damn," "dick, "hell," "s--t," "a--hole," and several instances of "f--k."

Drinking, Drugs & Smoking

Main characters get drunk and high a couple times. Consequences include hangover, trouble with parents, etc.

What parents need to know

Parents need to know that author Shannon Takaoka's Everything I Thought I Knew blends romance and quantum physics in a story about 17-year old Chloe, whose life is upended when she collapses at track practice and ends up getting a heart transplant. She's not sure who she is with her new heart. She takes up surfing, befriends a high school dropout who's her exact opposite, and makes some risky, dangerous choices on her way to figuring out who she really is. There's no violence but some scary moments: repeated nightmares about a motorcycle accident, a surfing mishap that knocks Chloe out and pins her under a wave, a very dangerous actual motorcycle ride, and a heart attack. The romance between Chloe and Kai is a main plot point, but they only share one intense make-out scene; Chloe recounts kissing a different boy a few months before she collapsed. Occasional strong language, including "damn," "dick," "hell," "s--t," "a--hole," and several instances of "f--k." Teen readers who appreciate a little romance with their theories of the multiverse are likely to enjoy this book.

User Reviews

  • Parents say
  • Kids say

There aren't any reviews yet. Be the first to review this title.

Teen, 13 years old Written bylouloulemonpie December 18, 2020

Interesting Novel- Shocking/Disappointing ending

When I started researching and reading this book I thought it was going to be like The Fault In Our Stars or 5 Feet Apart or another story like this. If that... Continue reading
Teen, 13 years old Written byOzmo123 February 22, 2021

A good story

This book had an interesting story about a 17-year-old girl named Chloe who has a heart transplant and the struggles that come along with it and with growing up... Continue reading

What's the story?

At the start of EVERYTHING I THOUGHT I KNEW, Chloe's life was carefully laid out -- she was on track to attend a top college and become a scientist. But then she learns she has a heart defect and needs a new heart to survive. Eight months later, she's missed half her senior year getting and recovering from the transplant. Physically she's OK, but she's plagued by nightmares of a motorcycle crash, has memories that do not feel like hers, and she starts surfing, something she never thought about doing before her transplant. Chloe is different in other ways, too: She gets drunk and high with a new friend who's her complete opposite, rides a motorcycle dangerously fast, and takes big risks out on the waves. She enjoys the sweet romance growing between her and Kai, her cute surfing instructor, but logical, science-believing Chloe can't distract herself from the nightmares and memories. Following her maxim of "it's better to know than not know," Chloe pursues answers to the questions plaguing her about her donor. When she learns the truth, will it actually help her to move forward?  

Is it any good?

The aftermath of an ambitious teen's heart transplant is a compelling premise for a YA novel and this highly readable first novel does not disappoint. Though Chloe's central problem in Everything I Thought I Knew -- trying to figure out who she is following a life-threatening medical crisis -- is highly particular, teen readers will relate to her search for meaning and identity. The main characters are well-drawn and interesting. Chloe and Kai's slow-burn romance is fun and deeply satisfying. It's easy to understand Chloe's desire to run from her internal crises by surfing, her opposites-attract friendship with Jane, experimenting with drinking and marijuana, and driving fast.

The weaving in of quantum physics and the possibility of multiverses opens up the story to fascinating possibilities. Author Shannon Takaoka's writing is precise and at times raw, and the action is well-paced. A major plot twist might feel over-the-top to some readers, but the catharsis and growth it leads Chloe to feel is hard-won and somehow right. With its high stakes, sci-fi bent, great surfing scenes, love story, and emotional ups and downs with family and friends, this book is a page-turning pleaser for many different kinds of readers.

Talk to your kids about ...

  • Families can talk about how science is incorporated into Everything I Thought I Knew. What did you learn about heart transplants? Quantum physics? The multiverse theory? What effect did these science ideas woven into the story have on you as a reader? Would you read more books like this?

  • Chloe struggles with friendships after her heart transplant. Why do you think this is? What does Chloe learn about friendships? What does Everything I Thought I Knew say about how to be a good friend? Do you agree?

  • As you were reading, what did you make of Chloe's sense that she had inherited the memories and interests of her heart donor? 

Book details

Our editors recommend

For kids who love romance and stories of physical illness

Themes & Topics

Browse titles with similar subject matter.

Top advice and articles

Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners.

See how we rate

About these links

Common Sense Media, a nonprofit organization, earns a small affiliate fee from Amazon or iTunes when you use our links to make a purchase. Thank you for your support.

Read more

Our ratings are based on child development best practices. We display the minimum age for which content is developmentally appropriate. The star rating reflects overall quality.

Learn how we rate