# Download the package.
wget https://archive.raspberrypi.org/debian/pool/main/r/rp-bookshelf/rp-bookshelf_0.6_amd64.deb

# Install the package.
sudo dpkg -i rp-bookshelf_0.6_amd64.deb

# Add Bookshelf to your Applications in GNOME.
mkdir -p ~/.local/share/applications
cd $_
grep -v NotShowIn /usr/share/applications/rp-bookshelf.desktop > rp-bookshelf.desktop