I visited the Sherlock Holmes museum in London earlier this week, so I'm on a Sir Arthur Conan Doyle kick. The Red-Headed League makes me laugh every time I read it.
I'm also reading The Sticklepath Strangler by Michael Jecks. Jecks has written a series of medieval murder mysteries set in the English county of Devon, where I live. If you enjoy Ellis Peters' Brother Cadfael books you'll probably enjoy Jeck's books.