Batman - The Dark Knight Vol 01 - Knight Terrors (2011) (Digital TPB)

The Dark Knight continues his crusade as defender of Gotham City, taking on his greatest foes during a breakout at Arkham Asylum. But when his enemies gain powers and abilities far beyond their normal capacities, the Caped Crusader's crusade may finally be at an end! Collects Batman: The Dark Knight #1-9