Falko Rademacher 
The Cat’s Calling. A Lisa Becker Short Mystery [EPUB ebook] 

Mischa is caught up by his past. Back in the days, when he witnessed a brutal murder, he narrowly escaped with his life. But the killer has never been convicted, as the body has not been found. Years later, Mischa has to face his demons yet again, and he is all alone and can only rely on himself. For Mischa is a tomcat.
A Short Mystery Thriller based in Berlin with Lisa Becker and a little detective on four paws.