Hi, co-conspirator here (I'm to blame for the typesetting/Graphics). I'm the other one involved in the production of this book, ever since the "Hey, why don't we..." realisation.
Lulu was in fact the source of the first few "prototypes", but there was pretty much only the single landscape format print size and it wasn't quite a good fit for the strips. So overall Amazon - and all their hoops - seemed like the way to go. Maybe we can do The Return of Beau Peep: Director's Cut for Lulu?
I'd be delighted/horrified to hear suggestions for improvements.