At the center of this third book in the Secret series is the Tuning Fork and its mystery. Cass, Max-Ernest, and Yo-Yogi find themselves involved in a great chocolate mystery. Sinister Señor Hugo, great experimenter of chocolate, and the infamous Dr. L and Ms. Mauvais hold Cass' mom as hostage as they seek the secret of immortality. Bosch again intersperses the story with warnings for readers and gives footnote explanations about types of chocolate. Ford's hauntingly humorous illustrations provide brief intermissions in the story. Although there is no secret code to unravel, fans of the first two books will find this sequel satisfying.--Petty, J. B. Copyright 2010 Booklist

Gr 4-6-Those who love chocolate and enjoy a good mystery are in for a treat with this third volume (Little, Brown, 2009) in the Secret series by the enigmatic Pseudonymous Bosch. In this installment, Cassandra is desperately trying to rescue her mother from the clutches of the sinister Senor Hugo, an evil dessert chef whose recipe for chocolate is deadly. Along with her good friend Max-Ernest, Cass must find the legendary Aztec tuning fork that possesses magical powers so that she can give it to Senor Hugo in return for Mother's life. Bosch, who is also a character in the story, provides first-person narration, indulging listeners with questions as well as humorous and sometimes helpful asides. This multicast version is principally narrated by Joshua Swanson, who does a wonderful job of portraying the peculiar and curious author. The remaining six cast members give an impressive and entertaining performance, and along with appropriate and well-placed sound effects, make this an enjoyable and engaging audio production. Fans of the series will not be disappointed, while newcomers are sure to seek out the first volumes after feasting on this one.-Amy Joslyn, Fairport Public Library, NY (c) Copyright 2010. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.