The GPS Guide to the London of Sherlock Holmes
Fifteen years ago, Mr. Wheeler began the task of locating every place in London associated with Sherlock Holmes. The culmination is this book which identifies over 400 sites and places them in adventure context. Each site is also identified by its GPS address. These addresses with a smartphone's GPS App, can provide turn-by-turn walking instructions from one site to the next. -- Cover, page [4]