Fullmetal Alchemist: Fullmetal Edition, Vol. 3

In an alchemical ritual gone wrong, Edward Elric lost his arm and his leg, and his brother Alphonse became nothing but a soul in a suit of armor. In the search to get their bodies back, the duo unwittingly sets in motion sinister mechanisms that spell disaster for one of their friends.

Fullmetal Alchemist: Fullmetal Edition, Volume 3, by Hiromu Arakawa.