I had no idea this existed:
The Charles Mingus Cat-alog for Toilet Training Your Cat
"This is the only authorized facsimile edition of a scarce pamphlet written and distributed by master jazzman Charles Mingus in 1972. The CAT-alog features Nightlife the cat and outlines Mingus's unique toilet-training program for felines."
https://50wattsbooks.com/products/the-charles-mingus-cat-alog