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  • Published: New York : Scholastic, c2010.
  • Year Published: 2010
  • Edition: 1st ed.
  • Description: 184 p. : ill. (chiefly col.) ; 20 cm.
  • Language: English
  • Format: Book

Reading Level

  • Lexile: 1010

ISBN/Standard Number

  • 0545285046


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  • Book

The black book of buried secrets

by Kass, Mallory.

There are no copies available

Where To Find It

Call number: Y Fiction / 39 Clues

Additional Details

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.

Community Reviews


cool if your a Madrigal don't read. Content is only suitable for Janus and Lucian.


It had so many secrets i never knew.


this book was my favorite book that had to do with cahills. the information was cool and not at all boring.



i love a great mystory

The secrets to the branches

The secret is amazing

scoop on the branch info

I love this book because it anwsers a lot of questions fans of the 39 clues have.


This is a great guide! It gave me more info about the Cahills.


This book is really good and has a lot of cool secrets but a lot of them you can find out from the website, and some are just kind of obvious.

liked it

liked it

The 39 clues

This book explains the secrets about all 4 branches of the cahill family

love it



i love the secrets


lots of great secrets/clues


cool secrets

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