While Batman attempts to recover from the devastating loss of Alfred, Two-Face returns but as The Joker begins his ultimate attack on Gotham, can Batman cure Harvey Dent once and for all? The Joker War finds Batman s nemesis launching an attack on Wayne Enterprises, using Bruce Wayne s own technology! Batwoman joins the fight, but the threats keep escalating, as Joker toxin has been pumped into Gotham s tunnels which lures out Killer Croc! This collection also includes the Batman: Pennyworth R.I.P. one-shot, featuring an ensemble of all-star creators paying tribute to Alfred, with each story told from the perspective of a different member of the Bat-Family. Collects Detective Comics #1020-1026, a story from Detective Comics #1027, Batman: Pennyworth R.I.P., and Detective Comics Annual #3.