Ahh, A Thousand Pieces of You was such a nice change of pace from heavy YA (most recently All the Bright Places) and girl-doubting-her-sanity YA (too many to name). Marguerite is the artsy-fartsy daughter of two brainy physicists. After a familial tragedy, she and her parents' research assistant use Firebirds (fancy necklaces invited by her parents) to travel between dimensions in an attempt to make everything better. The rules for dimension jumping dictate you can only travel to a dimension in which you exist, and the time you arrive is the same as the time you left in your previous location. With each jump, Marguerite sees how her parents' life choices (combined with luck and historical events) could have played out to create a very different life for her. Fun, fluffy, and action-packed with imaginative technology and vivid descriptions of Tsarist Russian fashion. 
 This book was a BOTM 2015 for Addicted to YA.