11 books in series

DC Animated Universe

DC Animated Universe is a 11-book series with 11 primary works first released in 1992 with contributions by Paul Dini, Bruce Timm, Scott McCloud, Hilary J. Bader, Bo Hampton, Mark Millar, Ty Templeton, J.T. Krul, and Kelley Puckett.

Batman/Teenage Mutant Ninja Turtles Adventures
Batman Beyond 2.0, Vol. 1: Rewired
Batman: Harley and Ivy
Gotham Girls
Superman Adventures 3
Superman Adventures 4
Batman & Robin Adventures 2
Batman & Robin Adventures 1
The Batman Adventures, Vol. 4
The Batman Adventures, Volume 1: Rogues' Gallery
Cover 2

Justice League Adventures

Cover 4

Justice League Adventures, Vol. 2

Batman Beyond 2.0, Vol. 2: Justice Lords Beyond
The Batman Adventures: Shadows and Masks
Batman: The Collected Adventures: Vol 1