Download Sigil - Sigil-Ebook An up-to-date version of Sigil is available via flatpak on Flathub So if your distro can use Flatpak, you can always use Sigil that way if your distro’s Sigil package seems to be lagging too far behind
Releases · Sigil-Ebook Sigil - GitHub Sigil is a multi-platform EPUB ebook editor Contribute to Sigil-Ebook Sigil development by creating an account on GitHub