Sherlock Holmes - In Pursuit of the Tetragram

Sherlock Holmes is back in an unpublished case that will change everything you thought you knew about him.

When a professor of cryptology is found murdered outside the British Museum, his dying message sends Holmes and Watson on a breathless chase across four continents. The clue: an ancient symbol called the Tetragram - four letters, four elements, four cities. Egypt, Jerusalem, Rome, Trier. But these are only the first four pieces of a puzzle whose fifth element is a forbidden melody: the ...