Percy Jackson's plan to have just one regular school year isn't going so well. And it's about to get worse, as the gods have a new quest for him. Percy's next challenge ? Pet-sitting for the goddess Hecate. Easy, right ? Wrong. When the terrifying pets escape, Percy and his friends must hunt them down or face the full fury of Hecate - and her horrifying three heads ... Readers new to the Percy Jackson universe and long-time fans will love this adventure - full of legendary heroes, mythical creatures, ancient Greek gods and enduring friendship.