日本語版を知っているので、「この言葉はこう言うんだ！」と思いながら読め、英会話練習の目的を達していると思います。円高のうち（割引があるうち）にたくさん通読したいと思います。 ３冊分が一冊に入っているので割安ですが、持ち運びから、飾ったときとかを考えると分かれていたほうが良いですね。

High jinx on the high seas! Buy three volumes of "One Piece" for the price of two! R to L (Japanese Style). Follow the beginning of Luffy's search for the greatest treasure in the world... one guy alone in a rowboat, in search of the legendary "One Piece." Three volumes of One Piece for the price of two! (Contains volumes 7,8,9). As a child, Monkey D. Luffy dreamed of becoming the 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! Now Luffy, with the help of a motley collection of pirate wannabes, is setting off in search of the "One Piece," said to be the greatest treasure in the world...