I used to draw strips for the band's fanzine in the late 80s/early 90s and was invited, along with other cartoonists who drew for the band, to contribute to the new book. We were provided with rough storylines, and asked to illustrate and expand on them. My strip was a transcription of a real tour-bus conversation, to which I added a few humorous flights of fantasy.
A postscript to this is that I received a free copy of the band's new album El Rey this week and found that I'm among the thank-yous in the CD booklet! As I've been a fan of the band for 21 years I got quite a kick out of that.
You can see a couple of my strips from 1989 at the Wedding Present fan site Something and Nothing.
Royston's portfolio website