cd $HOME
mkdir calibre_app && cd calibre_app
wget https://download.calibre-ebook.com/7.22.0/calibre-7.22.0-x86_64.txz
tar Jxvf calibre-7.22.0-x86_64.txz
rm calibre-7.22.0-x86_64.txz
ln -s $HOME/calibre_app/calibre $HOME/.local/bin/calibre
`
create a File calibre.desktop save it in ~/.local/share/applications
[Desktop Entry]
Encoding=UTF-8
Version=1.0
Type=Application
Icon=calibre-gui
Exec=calibre
Name=Calibre
Comment=Calibre Ebooks
Categories=Office
Path=
Terminal=false
StartupNotify=false
You can start it in terminal with
calibre
or from Menu