Logical Deduction Puzzles  (English, Paperback, Summers George J.)

It's not elementary, but you will need Holmes's famed powers of deduction to solve these crafty puzzles. Here's how it goes: at the end of each conundrum, you'll find at least one condition - and sometimes more - that the solution must meet. A few of the puzzles demand a basic knowledge of algebra, and others feature drawings or diagrams. It is complete with a Solving Strategies section that provides helpful hints, and also the answer section so you can see if you were right!