Six Months Later by Natalie D. Richards

Paperback - New
Fiction; Thriller; Teen/Young Adult
 
When Chloe fell asleep in study hall, it was the middle of May. But when she wakes up, snow is on the ground, and she can't remember the last six months.
Before, she'd been a mediocre student.
Now, she's on track for valedictorian and being recruited by Ivy League schools.
Before, she never had a chance with sports star Blake.
Now he's her boyfriend.
Before, she and Maggie were inseparable.
Now her best friend won't speak to her.
What happened to her? Remembering the truth could be more dangerous than she'd ever imagined.