Download or read book The Black Book of Buried Secrets written by Mallory Kass and published by Scholastic Press. This book was released on 2010 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the characters and situations in "The 39 Clues" outlines the Cahills' secrets, including hidden facts, strategies, agents, lost founders, secret bases, and scandals, as well as information about all branches of the family.