Fullmetal Alchemist Omnibus 4 collects volumes 10-12 in omnibus format and features story and art by Hiromu Arakawa.

Ed returns to Resembool and meets his estranged father Hohenheim for the first time in many years. Though their meeting is brief and strained, Ed comes away with the revelation that Al's body is still alive somewhere. But before the newly energized brothers can search for it, Scar returns, catalyzing an unlikely alliance between the Elric brothers, Prince Lin of Xing, and Colonel Mustang. Though they hope to use Scar to lure in a homunculus, the hunters become the hunted when Gluttony proves more than they can handle.