If you are a sherlock holmes fan these logic puzzles center around holmes and watson. if you like logic puzzles that tell a story, that center around a central theme so that you can feel you are working in an imaginary world, this is the classic logic puzzle set for you. there is a special bonus feature for those who can solve all the puzzles. a new sherlock holmes story (pastiche) "the adventure of the shanghaied sailor" will be unlocked if you can solve them all. this isn't that easy a task. there are some with a rating of 3, but the puzzles vary in complexity with the difficulty level going all the way up to 11. difficulty ratings by the way, are based on how many runs it took the computer to solve the puzzle. if you love grid logic puzzles and love sherlock holmes this is the series of puzzles for you.