Gr 4-7--Following Rick Riordan's first book in the projected 10-title series, The Maze of Bones (SLJ, Feb. 2009, p. 58), Gordon Korman has written the second installment (Scholastic, 2008) about Amy and Dan Cahill's quest for the 39 clues left by their deceased wealthy and eccentric grandmother who has promised to reward the winner with unimaginable riches. Those unfamiliar with the first book will miss out on some of the past history, but there is enough background given here to ensure that listeners will enjoy the mystery and adventure. Dan, 11, is impetuous and resourceful, while Amy, 14, is pedantic but brilliant. Narrator David Pittu, with only slight voice and accent variations, brings to life their constant squabbles as well as the threats by their nefarious relatives, such as a scheming rock star and his father, a former KGB agent, an entire family of enemies, and an elderly "gentleman" with evil intentions. The orphans, on the run from the Massachusetts Child Protection Program, are supported by their patient and resourceful companion Nellie and their grandmother's cat, Saladin. Pittu is almost breathless as he describes vehicle races on the road and along the canals of Venice. A lot of historical information is presented about Venice, Mozart, Marie Antoinette, and more. A fun listen.--Edith Ching, Washington Latin Public Charter School, DC[Page 53]. Copyright 2008 Reed Business Information.