One Piece, Vol. 41: Declaration of War

Luffy learns that his brother Ace is to be publicly executed at Marineford. He infiltrates Impel Down — the world's most impenetrable prison — to mount a rescue.

• Author: Eiichiro Oda
• Genre: Action / Adventure / Shonen Manga
• Series: One Piece (Vol. 41)
• Format: Paperback Manga
• Publisher: VIZ Media
• Published: 2010-04-06
• ISBN-13: 9781421534572