Percy Jackson and the Olympians Series by Rick Riordan:
This series is a lot of fun. Written with the voice of a sarcastic boy named Percy, the epic saga to restore the balance between demigods and gods is a familiar tale if you've read the original myths.
The Heroes of Olympus Series by Rick Riordan:
The Goddess Test Series by Aimee Carter:
The Goddess Legacy by Aimee Carter:
Cupid by Julius Lester: