High res pic I took six years ago: 
The card reads: Warmest greetings from the DuMont publishing house. Have fun reading it!
The cover reads: Help, my cat is broken! 200 cats going beyond their limits
High res pic I took six years ago: 
The card reads: Warmest greetings from the DuMont publishing house. Have fun reading it!
The cover reads: Help, my cat is broken! 200 cats going beyond their limits
I also thought that, but then I remembered my Latin:
Kaput comes from the Latin for “head”, caput. Knowing that but not knowing any German, my guess is because it looks like the cat’s head is in the basket instead of on its neck :)
Kaputt means “broken” or “non-functional” in German, like: Die Tasse von meiner Oma ist mir heruntergefallen. Nun ist sie kaputt. (I dropped my granny’s cup. It’s broken now.)
Here, it looks like the head of the cat is broken off.
Nice, double meaning :)
Probably not intentional