Hi Susanne,

"Bb" describes a chord that you play on the guitar (it means "B flat") - so really all that is needed is the words to the songs with those chord descriptions where the appropriate place in the song is.

i.e.
A-(Bb)way ye gay landscapes, ye garden of roses!
In (Eb)you let the (Bb)minions of (Eb)luxury (F)rove;

alternatively written;

(Bb)
A-way ye gay landscapes, ye garden of roses!
(Eb)            (Bb)          (Eb)      (F)
In you let the minions of luxury rove;

in any case the chord shows where the guitarist should change chords relative to the lyrics being played.
does that help?
If the lyrics in the book have these chord symbols written with them, than a copy of that posted would i imagine be all that is required.

Jack