Hi thumbs,
Quick directions on how to find the lyrics:
Go to the main page (click "Home" at the top or bottom of the screen)
As the third option you will find a link to all lyrics for the Songbook-rarities.
You can alternatively use this direct link:
Lyrics to Songbook rarities
If you are looking for the lyrics to a song but don't know which album it is on, try the option "Songs" from the main page. It will give you an alphabetical list of all songs, including the Songbook rarities.
Enjoy.