I've often been asked to produce a book of my songs, and I wonder what format to use.
The expensive method is maybe twenty songs with the musical notation, chords, lyrics etc
The cheaper option is just the lyrics with chords over which would enable more songs to be included
Working on the basis that most people wouldn't buy the book unless they had the cds, knew the melodies, I'm inclined to option two, but I wonder what the rest of you want from a songbook?