This debut book by Nicola Yoon is very hard to put down! Told in first person by Maddy, a girl who is housebound by extreme allergies, it's peppered with definitions from "Maddy's dictionary," "spoiler reviews" of classics she reads and re-reads, emails, worksheets, and online chats with the new neighbor, Olly, whom she corresponds with in spite of her mother's fear for her heart and health. 
 Update: I just read this very interesting review that gave me some different food for thought about how disability is depicted in this book. Spoilers! http://disabilityinkidlit.com/2015/09... 
 Favorite quotes: (view spoiler)[ 
 "Just because you can't experience everything doesn't mean you shouldn't experience anything. Besides, doomed love is a part of life." 
 Maddy's Dictionary: asymptote - a wish that continually approaches but never achieves fulfillment. 
 "He tells me that high school is no utopia, but I'm not convinced. What else would you call a place that exists solely to teach you about the world? What do you call a place with friends and teachers and libraries and book club and math club and debate club and any other kind of club and after-school activities and endless possibilities?" 
 "I miss getting to know the Maddy that I am when I'm with him." 
 "I was happy before I met him. But I'm alive now, and those are not the same thing." 
 "In my head I know I've been in love before, but it doesn't feel like it. Being in love with you is better than the first time. It feels like the first time and the last time and the only time all at once." 
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