okay this my first book so its probably gonna be very suckish so please bear with me and I suck at giving descriptions so let's cut to the chase this is a Percy Jackson book obviously and I know this is used a lot but this is my favorite kind so here it is

A young sleeping hero cursed forever by a god another child of the same face will awaken the hero from her slumber of nightmares yet she was meant not to exist because of her bloodline