In a brand-new series from blockbuster best-selling author Rick Riordan, fans return to the world of Camp Half-Blood. Here, a new group of heroes will inherit a quest. But to survive the journey, they’ll need the help of some familiar demigods. Hardcover, 576 pages. Launch date: October 12, 2010. — "We sold145 from 10/3 to 11/19," said Barbara Fineblum, owner of Barston's Child's Play in Baltimore.