3.5 stars. Note: Newbery award. Also, the 'supernatural' shelf doesn't wholly fit, but 'realistic fiction' didn't either, and 'science fiction' would be an exaggeration. It is somewhere in between. 
 For Mibs Beaumont and her relatives, turning 13 marks the day they may receive their "savvy", that is a unique power or talent. They don't have any idea what the power might be before they get it, and sometimes it takes some learning to fully understand it after they've gotten it. Mibs' Grandpa could move mountains. Her mother did everything perfectly. And her brothers had some seriously powerful savvies that they were struggling to control. 
 When Mibs turns 13, her Dad is in a hospital some distance away, and she decides to take off to be with him. Much of the book involves the adventures she (and the others that are with her) experiences trying to get to him. During the adventure, she struggles to understand her savvy. She deals with the new emotions of liking a boy. She learns about herself and better appreciates others around her, and stuff. 
 I like the idea of the book more than I liked the execution, or else I would have given it a higher rating. The writing style is good, though I did not particularly bond with any of the characters. Still, it was good enough to start reading the second title, which is more of a companion novel, Scumble. It has sparked some fun conversations with my sons (I read this one aloud to them, 12 and 10) about what sort of savvies we would like, and what we might do with the ones the characters in the book had.