He's a German of Turkish origin, but as his books have been translated into many languages, I guess they are also available in English.
The Felidae books are crime stories, but from a cat's view.
Anyway, the hero of this stories is the cat Francis. His curiosity made him a hobby-detective who has seen the dark sides of the human and the feline nature. Francis is cynical, and his observations of the human race are both entertaining - and embarrassing!
I'm currently reading the 5th book of the series, "Salve Roma!",. Book Nr. 6 has just been published, but is not available as a paperback yet, so I will wait...
Just in case you're interested, here are the first two books of the series:
Felidae on the Road
Wow, the second one seems to be rare to find as an English translation, just look the price on amazon market place!