The Adventure of the Haunted Detective

Sherlock Holmes will be investigating ghosts? Does life get better than this? From Reuters:

Carr teams Holmes up with his sidekick Dr. John Watson in his book that has the duo dealing with the specter of ghosts and spirits. Holmes goes solo in the other new entries. Carr's novel grew out of a short story requested for the forthcoming anthology "Ghosts of Baker Street," commissioned by the Conan Doyle estate to portray encounters between Holmes and Watson with the supernatural. The novel revolves around two murders in Edinburgh's Holyrood royal castle where a ghost is feared.

Lots of clues to other upcoming books about the Great Detective in the story.