Calibre 3.39.1 发布了，Calibre 是一款功能强大的电子书管理软件，支持 Amazon、Apple、Bookeen、Ectaco、Endless Ideas、Google/HTC、Hanlin Song 设备及格式。
Content server: Implement the "Copy to library" function. To use it click the three dots in the top right corner of a book's page and choose "Copy to library"
Closes tickets: 1810486
Content server: Add Next/Previous buttons to the book details page
Content server: Fix editing metadata that affects multiple books causing all the metadata for all the books to become the same.
Closes tickets: 1812781
Open With: Fix using .bat files as the program not working.
Closes tickets: 1811045
ZIP Output: Fix an error when building the ToC on macOS for some books with non-ASCII ToC entries
Closes tickets: 1813905
Edit book: Check book: Follow recent releases of epubcheck in expecting .ttf files to have the mime-type application/vnd.ms-opentype in EPUB 3 books
Fix font mime-types not being auto-corrected when upgrading EPUBs from 2 to 3
Content server: Try to detect if a book file has been edited outside of calibre and serve the updated copy
Fix merging books not updating author if the source book has no title
Content server: Fix heading for custom comments columns being duplicated in the book details page
Fix editing of dates not working is the date format is set to iso.
Closes tickets: 1812560
Version 3.39.1 fixes a bug in 3.39.0 that broke copy to library for books that have saved conversion options
Closes tickets: 1814279