The open electronics textbook.
$ bundle install
$ bundle exec rake book:build
Converting to HTML...
-- HTML output at openelectronics.html
Converting to EPub...
-- Epub output at openelectronics.epub
Converting to Mobi (kf8)...
-- Mobi output at openelectronics.mobi
Converting to PDF... (this one takes a while)
-- PDF output at openelectronics.pdf