fbreader

Install command: 
brew install --cask fbreader

Name: FBReader

Book reader

https://fbreader.org/macos/

Cask JSON API: /api/cask/fbreader.json

Cask code: fbreader.rb on GitHub

Current version: 2.1.3

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
fbreader 51
Installs (90 days)
fbreader 153
Installs (365 days)
fbreader 612