Fullmetal Alchemist (3-in-1 Edition), Vol. 6

Contains Volumes 16, 17 and 18!The Elric brothers head north to Fort Briggs in search of May Chang, whose Xing alchemy may contain the answers they seek. But as Ed and Al soon discover, the only thing less forgiving than Briggs's weather is the regiment of hardened soldiers assigned to defend it. Matters grow even more complicated when Ed and Al get thrown in lockdown and the sadistic Kimblee arrives from Central with Winry as his hostage. But even Kimblee's cruelty pales in comparison to the evil of the new homunculi watching from the shadows...

Fullmetal Alchemist (3-in-1 Edition), Volume 6 — collecting manga Volumes 16-18 — by Hiromu Arakawa.