Correlation, by Mia Grace, started out really strong and then unfortunately went downhill around the 70% mark. This novel tells the tale of Hailey Kent, a normal teenager by all means. School has just got out for summer, her and her BFF, Jenna, are inseparable, her brother is super annoying, and she just got a new super cool bike. Things come to a screeching halt though when her brother is in a car accident and ends up in a coma, and her BFF's brother was the driver. Then Jenna goes out of town for a while, and on top of that, Jenna's new bike gets stolen. Determined to still visit the old house that she discovered with Jenna, she borrows a bike from Jenna's grandmother, only to discover that she's somehow ended up in the 1960's. The house is now occupied and in its full glory, complete with a boy who in her time - is long dead from the Vietnam War. Hailey is determined to save his life - but how? She doesn't know how to convince him she's from the future AND convince him that he's going to die if he goes to Vietnam. Can Hailey pull it off?
Soon, Hailey wakes up in the hospital, herself a victim of a car accident. Her brother is no longer in a coma and Jenna doesn't exist. Has Hailey done it? Has Hailey changed history?