my demigod life

Sam Collins. a super geek with a story. Daughter of Athena, been at camp half blood since she was 10. fights with a knife, is a ruthless battle planner. Knows when things are going her way. one more detail, she has this huge and insane crush on the new guy. Leo Valdez. You know him, he's the guy who's mother died, the joker, the boy who fell in love with every girl he saw, as long as she was completely out of his league. what happens when Sam's friends give her a little push to help her on her way of getting Leo to notice her? what happens when Leo starts to notice? How is Sam's past going to creep up on her? and above all, who is the bad guy?