*BOOK 2 IN THE TRILOGY* Luna Silver is back, and this time she's more powerful than ever. With her boyfriend, Percy Jackson, by her side she feels unstoppable. That is, until she starts to lose control of her newfound powers. As she begins to isolate herself from Percy and the world, monsters come to kill the forbidden lovers. Add in a dying tree that protects you and a trip to the Sea of Monsters, nothing will get easier for them.