If "piece" refers to the manga , you can find digital databooks such as One Piece Blue Deep or One Piece Red in EPUB format on the Internet Archive . For the main manga volumes, readers often download .cbz files and use software like Calibre to convert them to EPUB.
If you are looking for this specific title or related works on Kaizen in EPUB format, here are your options: Management & Improvement Books
: A popular self-help approach to the concept. A preview is available via PubHTML5 . One Piece Manga (Alternative Interpretation)
: An English-language professional eBook covering Japanese concepts like Kaizen, available through Springer Nature .