One Piece Omnibus 9: Skypiea collects volumes 25-27 and features story and art by Eiichiro Oda.

Luffy and team must figure out a way to get their ship, the Merry Go, to sail up - the Straw Hat crew's next destination is an island in the sky. It may seem like an island paradise, but the interesting characters they meet there are hardly heavenly. Soon Luffy and the Straw Hats are on the run but they won't back down until they've got some gold!