4 books in series

The Dark Knight Saga

The Dark Knight Saga is a 5-book series with 4 released primary works first released in 1986 with contributions by Frank Miller and Brian Azzarello.

The Dark Knight Returns: The Last Crusade #1
Batman: The Dark Knight Returns
Batman: The Dark Knight Strikes Again
Batman: The Dark Knight - Master Race
Dark Knight Returns: The Golden Child #1
The Complete Frank Miller Batman