Riordan, Rick, <br/><br/>
The maze of bones / 
Rick Riordan ; graphic novel by Ethan Young ; with color by George Williams. 
 - First edition. 
 - 180 pages :  chiefly colour illustrations ;  23 cm. 
 - 39 clues ;  1. .
 - 39 clues (Graphic novel) ;  1. .
<br/><br/> Minutes before she died Grace Cahill changed her will, leaving her descendants an impossible decision: You have a choice-one million dollars or a clue. Grace is the last matriarch of the Cahills, the world's most powerful family. Everyone from Marie Curie to Harry Houdini is related to the Cahills, yet the source of the family power is lost. 39 Clues hidden around the world will reveal the family's secret, but no one has been able to assemble them. Now the clues race is on, and young Amy and Dan must decide what's important: hunting clues or uncovering what really happened to their parents. 
<br/><br/> For ages 9-11 years. 
<br/><br/><label>ISBN: </label>9781338803365 9781338803372 1338803379 1338803360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Siblings--Comic books, strips, etc.<br/>Orphans--Comic books, strips, etc.<br/>Code and cipher stories--Comic books, strips, etc.<br/>Families--Comic books, strips, etc.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Graphic novels.<br/>Detective and mystery comics.<br/>Action and adventure comics.