By the author of The Affair of the Bloodstained Egg Cosy (which you really want to get just for the title!) The Affair of the Mutilated Mink.
Now for those that think I've finally gone barking mad as this doesn't sound like my normal fare, this is a fabulous, tongue in cheek yoicks tally ho and away style which is frightfully funny (donchaknow) - well it is to me at least. And they are very entertaining books into the bargain. Of course it's all just ever so slightly over the top (and I have to say, one of the nicest dust jacket designs I've seen in a while.)