The current version of Bookworm (v1.1.2) supports eBooks in the following file formats: EPUB, PDF, MOBI, FB2, CBR, CBZ.
First, I install this software with dnf tool:
[root@desk mythcat]# dnf install bookworm.x86_64 ... Installed: bookworm-1.1.3-0.1.20200414git.c7c3643.fc32.x86_64 Complete!
I tested with some old EPUB and PDF files and I'm not very happy with formatting text on the page.
HI tested with some old EPUB and PDF files and I'm not very happy with the formatting for certain texts on the page, like source code in programming.
Bookworm does one thing and does it well for this simple reader.
You can help this project on GitHub.