Holmes was a secretive man, but he did let slip a few details of his private life, which you may remember. He distrusted women, but you will need to know something of the few he did admire. There are questions about his many adversaries and the cases that he solved - also the very few that defeated him.

There are crossword puzzles based on Watson's reports of Holmes's cases, laced with a few cryptic clues. Puzzle grids lead you through the foggy streets of Holmes's London and out into the countryside, hot on the trail of the master detective and his sidekick. Anagrams further test your ingenuity and there is a maze to trap the unwary.

Finally, there is a quiz to test your knowledge of Holmes's creator, Sir Arthur Conan Doyle.

The puzzles draw on both the four long stories - 'A Study in Scarlet', 'The Sign of the Four', 'The Hound of the Baskervilles' and 'The Valley of Fear' - and the five collections of short stories - The Adventures of Sherlock Holmes, The Memoirs of Sherlock Holmes, The Return of Sherlock Holmes, His Last Bow and The Case Book of Sherlock Holmes.