
Christopher Grabenstein is an American author. He published his first novel in 2005. Since then he has written novels for both adults and children, the latter often with frequent collaborator James Patterson. He graduated from the University of Tennessee in 1977 with a degree from the College of Communication and Information.
Excerpt from Wikipedia, available under CC BY-SA 4.0.

I funny
2013
ISBN 9780316206938
House of Robots (House of Robots, 1)
2014
ISBN 9781478955856
Jacky Ha-Ha
2017
ISBN 9780606407328
Mr. Lemoncello's very first game
2022
ISBN 9780593480847
Mr. Lemoncello's Library Olympics
2016
ISBN 9780553510409
Mr. Lemoncello and the titanium ticket
2020
ISBN 9780525647744
Super Puzzletastic Mysteries
2020
ISBN 9780062884220
Hell Hole
2009
ISBN 9781429982764
Danger down the Nile
2014
ISBN 9780316370868
Armageddon
2013
ISBN 9781471323027
My Life is a Joke Jacky Ha-Ha series. book 2
2017
ISBN 9780316449373
Escape from Mr. Lemoncello's Library
2013
ISBN 9780307974969
Daniel X
2013
ISBN 9780316101776
Genius Camp
2021
ISBN 9780593301777
Jacky Ha-Ha
2020
ISBN 9780316491952
I Even Funnier
2013
ISBN 9780099567448
I totally funniest
2015
ISBN 9780316405935
Secrets of the Forbidden City
2015
ISBN 9780099596493
Our Story Begins Your Favorite Authors and Illustrators Share Fun, Inspiring, and Occasionally Ridiculous Things They Wrote and Drew As Kids
2018
ISBN 9780606413565
The plunder down under
2020
ISBN 9780316420587
Danger Down the Nile James Patterson and Chris Grabenstein
2014
ISBN 9780316376297
I Funny A Middle School Story
2015
ISBN 9780316206921
Peril at the top of the world
2016
ISBN 9780316346931
Scream and scream again! a horror-mystery anthology
2018
ISBN 9780062495693