When Samantha Harper meets the man of her dreams, they have sex and he never calls again. Now, Samantha wishes she could take it back. To her surprise, her wish comes true, and she's sent back in time to figure out how long a woman should wait to have sex, to get her dream guy to fall in love . . .
Sophie Kinsella's Remember Me?;
Candace Bushnell's Sex & the City;
The Time Traveler's Boyfriend by Annabelle Costa