Grimmory
Grimmory organizes ebooks, comics, and audiobooks in a multi-user library with a built-in reader. It is for readers who want one program for these three kinds of media, as well as households or other groups that need separate user access. Metadata lookup supports the library catalog, while OPDS provides access through compatible reading clients. Kobo and KOReader sync is included for people who use those reading platforms. The program brings its reader, metadata lookup, OPDS access, multi-user support, and named sync options together in the same library. Readers can manage all three supported media types through that single library. Its scope is also its main limitation: it is limited to ebooks, comics, and audiobooks, so it does not cover media outside those categories.
Key features
Install
What's new in v3.5.0
## [3.5.0](https://github.com/grimmory-tools/grimmory/compare/v3.4.1...v3.5.0) (2026-09-20) This minor release primarily fixes three identified security issues in Grimmory: * The `/api/v1/settings` endpoint allowed any user to access sensitive server settings. ([GHSA-x6vg-344c-qrmv](https://github.com/grimmory-tools/grimmory/security/advisories/GHSA-x6vg-344c-qrmv)) * The upload feature did not restrict users to only…