This is the kind of novel I can only heap praise on. 
 It is one of the most original, well-written and enjoyable stories I have ever read. I love the cover and the illustrations inside the book which really enhanced the experience. The way the author wrote this book with short, individually titled passages interlaced with the inclusion of notes, lists, medical records etc. made this a fun and interesting read. 
 The characters Maddy and Olly are absolutely adorable and funny. Their interactions both online and in person were engaging and interesting. Throughout the novel (until the end) I felt really sad for Maddy, because, understandably, she wants so badly to be able to do the things normal teenagers can do. And she is reminded of this fact every day, especially after she meets Olly, who opens up the world for her. I felt sad for him too at the injustice of his father who abuses Olly and his family. This novel touched my heart and at times tugged on my emotions. As well, it enlightened me about SCID, a condition I didn't know about until this novel. It made me grateful for what I have and am able to do and reminded me that some people don't have these privileges. 
 I really enjoyed the author's writing of the novel as a whole and found that Maddy and Olly created a very sweet and interesting relationship together. However, I did find at times that Olly could be a little bit too good too be true. He is a really nice guy and I liked that about him of course. 
 When I came close to finishing, I thought it could end in two ways, both tragically. But instead, the author came up with a decent, well-written plot twist that I never would have thought of. It is also very sad when the plot twist happens. However, I did feel that the ending was a bit of a cop-out; it was satisfying though. (view spoiler)[As in, now that Maddy doesn't have SCID (even though she still has some medical issues), she can then eventually go about having a normal life and I just thought that she actually had it and in the end would find some way to cope or at least be thankful for what she had with Olly and what he gave her, which she was of course but now she can see him freely; that's great but maybe not realistic? (hide spoiler)] 
 This book was so deep and profound in a good way; I can't imagine what it would be like to have eighteen years of life taken away from you, not being able to experience the potential of those eighteen or so years. This novel started out a bit slow but after a couple of chapters I was hooked. I finished this within a day; it is a book you definitely won't regret reading! It's original, funny and heartbreaking. I loved it. 
 4.5 stars 
 I received this book from Netgalley in exchange for an honest review.