I recall when they switched to the Brown songbook, "Sing Praises...", the song numbers were given from BOTH the pink and brown book, for those who had not yet purchased the new one. For some time, they were limited to songs that were found in both books.
I still have my large format Brown book, along with red pleather slip-cover from Ireland. Im not sure why I kept that after all these years. I even got the CD's of the music years after leaving, telling myself that they were "just good music". I think that the tunes reminded me of some of the good times, not the lies.