CONDITION – USED: Books sold are in GOOD or better condition. Good Condition: Minimal damage to the cover, dust jacket may not be included, minimal wear to binding, most of the pages undamaged(e.g., minimal creases or tears), highlighting / underlining acceptable on books as long as the text is readable and markings are not excessive, no missing pages. May be a former library book, with usual treatments(e.g., mylar covers, call stickers, stamps, card pockets, barcodes, or remainder marks). Extra components, such as CDs, DVDs, figurines, or access codes are not included. ISBN: 9780590228695 ISBN10: 0590228692 Contributors: Martin, Ann M.,

Kristy and her friends suspect that Cary and his Mischief Knights are vandalizing Stoneybrook Middle School. But are they? Together, the BSC members solve a series of eight puzzles--on the way to catching the real culprit.