: Download a compression utility like 7-Zip (free/open-source) or WinRAR.

: Right-click on the first file (ending in .7z.001 ). Select "Extract Here." The software will automatically "stitch" all parts together, including part .025, to recreate the original EPUB files.

: Ensure all files have the exact same name before the numbered extension (e.g., Library.7z.001 , Library.7z.002 ).