npm install -g packtpub-cli 

 packtpub v2.0.0 - Download freely offered books from packtpub.com Usage: packtpub <command> Commands: packtpub download Download book from daily offer packtpub login Log into packtpub.com packtpub logout Log out from packtpub.com packtpub view-offer Show daily offer packtpub whoami Show who are you logged as Options: -h, --help Show help [boolean] -v, --version Show version number [boolean] Homepage: https://github.com/vladimyr/packtpub-cli Report issue: https://github.com/vladimyr/packtpub-cli/issues