Amazon has put up a listing for the One Piece Manga Vol. 91, revealing the front cover as well as a release date. According to the product page, the 91st volume will be coming out on Aug. 6, 2019, in the U.S. region. If you are interested, you can preorder Vol. 91 of the One Piece Manga with this link from the online retailer; furthermore, you can also check out the front cover of the book, which is being published by VIZ Media, with the image located just below this paragraph.
You can also check out Amazon’s product description for One Piece Manga Vol. 91 below:
Join Monkey D. Luffy and his swashbuckling crew in their search for the ultimate treasure, One Piece!
As a child, Monkey D. Luffy dreamed of becoming King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber…at the cost of never being able to swim again! Years, later, Luffy sets off in search of the “One Piece,” said to be the greatest treasure in the world…
The Straw Hats head for a new land of adventure, the kingdom of Wano! But awaiting them there are Kaido’s powerful forces and all sorts of new problems!