Chris Grabenstein

Murdle Jr.: Sleuths on the Loose

by G. T. Karber, by Chris Grabenstein

Jacky Ha-Ha Gets the Last Laugh

by James Patterson, by Chris Grabenstein, Illustrated by Kerascoet

Treasure Hunters Digital Omnibus

by James Patterson, by Chris Grabenstein, With Mark Shulman, Illustrated by Juliana Neufeld

Treasure Hunters Complete Paperback Gift Set

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: The Greatest Treasure Hunt

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Jacky Ha-Ha: My Life Is a Joke

by James Patterson, by Chris Grabenstein, Illustrated by Kerascoet

Jacky Ha-Ha

by James Patterson, by Chris Grabenstein, Illustrated by Kerascoet

Best Nerds Forever

by James Patterson, by Chris Grabenstein

Treasure Hunters: The Ultimate Quest

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Katt Loves Dogg

by James Patterson, by Chris Grabenstein, Illustrated by Anuki Lopez

Katt vs. Dogg

by James Patterson, by Chris Grabenstein, Illustrated by Anuki Lopez

Jacky Ha-Ha: My Life is a Joke (A Graphic Novel)

by James Patterson, by Chris Grabenstein, Adapted by Adam Rau, Illustrated by Betty Tang

World Champions! A Max Einstein Adventure

by James Patterson, by Chris Grabenstein

Scaredy Cat

by James Patterson, by Chris Grabenstein

Max Einstein: Saves the Future

by James Patterson, by Chris Grabenstein, Illustrated by Beverly Johnson

Treasure Hunters: The Plunder Down Under

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Jacky Ha-Ha: A Graphic Novel

by James Patterson, by Chris Grabenstein, Adapted by Adam Rau, Illustrated by Betty Tang

Max Einstein: Rebels with a Cause

by James Patterson, by Chris Grabenstein, Illustrated by Beverly Johnson

Max Einstein: The Genius Experiment

by James Patterson, by Chris Grabenstein, Illustrated by Beverly Johnson

Treasure Hunters: All-American Adventure

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

House of Robots: Robots Go Wild!

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: Danger Down the Nile: Booktrack Edition

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: Booktrack Edition

by James Patterson, by Chris Grabenstein, With Mark Shulman, Illustrated by Juliana Neufeld, Read by Bryan Kennedy

House of Robots

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: Danger Down the Nile

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

The Nerdiest, Wimpiest, Dorkiest I Funny Ever

by James Patterson, With Chris Grabenstein

I Even Funnier

by James Patterson, by Chris Grabenstein, Illustrated by Laura Park

Laugh Out Loud

by James Patterson, by Chris Grabenstein, Illustrated by Jeff Ebbeler

I Funny: School of Laughs

by James Patterson, With Chris Grabenstein, Illustrated by Jomike Tejido

House of Robots: Robot Revolution

by James Patterson, With Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: Peril at the Top of the World

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Daniel X: Lights Out

by James Patterson, by Chris Grabenstein

I Funny TV

by James Patterson, by Chris Grabenstein, Illustrated by Laura Park

House of Robots: Robots Go Wild!

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters Boxed Set

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

House of Robots

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters: Secret of the Forbidden City

by James Patterson, by Chris Grabenstein, Illustrated by Juliana Neufeld

Treasure Hunters

by James Patterson, by Chris Grabenstein, With Mark Shulman, Illustrated by Juliana Neufeld

I Funny

by James Patterson, by Chris Grabenstein, Illustrated by Laura Park

I Totally Funniest

by James Patterson, by Chris Grabenstein, Illustrated by Laura Park

Daniel X: Armageddon

by James Patterson, With Chris Grabenstein