Bickering New York City roommates and high school seniors Meg and Shar must find a way to balance their love of fashion with the drudgery of being special-assignment Sirens, luring to the Underworld those whose unholy contracts are up.

Twelve-year-old Percy Jackson is about to be kicked out of boarding school...again. No matter how hard he tries, he can't seem to stay out of trouble. But can he really be expected to stand by and watch while a bully picks on his scrawny best friend? Or not defend himself against his pre-algebra teacher when she turns into a monster and tries to kill him? Of course, no one believes Percy about the monster incident; he's not even sure he believes himself....