I've just reviewed a new collection of essays on Crime Fiction in German, edited by Katharina Hall who, as well as being a Professor of German, blogs on international crime fiction at Mrs Peabody Investigates. Apparently it's the first study in English “to offer a comprehensive overview of German-language crime fiction from its origins in the early nineteenth century to the post-reunification Germany of the new millennium”.
It's an absolutely fascinating collection, one which has proved very useful to me in my research for Watching the Detectives. You can download Professor Hall's introduction to the volume for free here. Unfortunately you will have to buy a copy of the Times Literary Supplement to read my review. Or if you have a subscription you can read it here.