In A Heartbeat was a touching story of love, loss, and new chances at life. It wasn't something that I was really excited to read because of how sad I expected it to be. Surprisingly, it was just as happy as it was sad.In A Heartbeat is about two completely different girls, connected by one heart. Eagan didn't expect to die at sixteen but she did. In a freak accident she lost her life and Amelia got a second chance at hers. Amelia never thought she would actually get a new heart but she did. She got Eagan's. With her new heart, she changed. She got new cravings, new feelings, and a new attitude. She got the chance to live when she never thought she would. The only thing she wants now is to find out who her donor was and thank her family. With the help of a new friend, she just might get her wish.Eagan and Amelia were two amazingly different characters. I liked the contrast between the two. It made them both unique and likable characters. I also loved that the point of view alternated between them both. We got to see Eagan's memories and without them I never would have been able to relate to her. I did feel like I didn't really know Amelia at parts, though, because we didn't get to see what her past was like, what she was like before her heart problems. I guess I would have liked a little more background on her.Overall, In A Heartbeat is a book I would recommend for people who like tearjerkers. It had me tearing up at some places and that doesn't happen easily for me. It was a bit sad, but it was so much more than that too. It's about being able to let go but still live on in the hearts and minds of everyone you loved.