Batman: Arkham Unhinged — DC Comics
Issue: #11
Learn how the Abramovici conjoined twins made their way from a small Siberian village to a traveling freak show, and finally to the depraved insanity of ARKHAM CITY. What role did Joker have in their journey to Arkham City...and also their horrific separation?
First appearances: Mister Hammer
Creators: Derek Fridolfs, Travis Lanham, Travis Lanham, Juan Jose Ryp, Sarah Gaydos, Andrew Elder, Jim Chadwick, Dave Wilkins
Characters: Batman, Alfred Pennyworth, Dick Grayson, Harley Quinn, Mister Hammer, Sickle