Chris Grabenstein books in order
25 books in the catalogue, about 152 hours of reading in all; the shortest takes 5 hours and the longest 8 hours.
5 series and 13 standalone books in the catalogue.
Mr. Lemoncello
8 books
Escape from Mr. Lemoncello's Library 5.9 h 
Mr. Lemoncello's Library Olympics 5.3 h 
Mr. Lemoncello's Great Library Race 5.3 h 
Mr. Lemoncello's All-Star Breakout Game 5.3 h Mr. Lemoncello and the Titanium Ticket length not known
Mr. Lemoncello's Very First Game length not known
Mr. Lemoncello's Fantabulous Finale length not known
Mr. Lemoncello's Wondermous Christmas Gift length not known
I Funny
5 books
Jacky Ha-Ha
2 books
Jacky Ha-Ha 7.0 h Jacky Ha Ha: My Life Is A Joke length not known
Treasure Hunters
4 books
Treasure Hunters 8.3 h Treasure Hunters: Danger Down the Nile length not known
Treasure Hunters: Secret of the Forbidden City length not known
Treasure Hunters: Peril at the Top of the World length not known
House of Robots
3 books
House of Robots 6.0 h House Of Robots: Robots Go Wild length not known
House Of Robots: Robot Revolution length not known
Standalone books
Armageddon 5.7 h 
Lights Out 5.3 h 
Danger Down the Nile 8.5 h 
Robots Go Wild! 5.8 h 
Secret of the Forbidden City 7.5 h 
The Island of Dr. Libris 4.6 h 
Word of Mouse 5.6 h 
My Life Is a Joke 6.3 h 
The Genius Experiment 6.5 h 
Katt Vs. Dogg 6.2 h 
Rebels with a Cause 5.9 h 
Smartest Kid in the Universe 5.6 h 
Katt Loves Dogg 5.3 h