The title is slightly misleading, in that the book contains 16 variations of the same game, but don't be deterred by that. Each game contains 12 cards, one of which explains to the students what they have to do, with the rest giving clues to the answers. The students then have to solve the jigsaw of information to arrive at the solution.
Most of the games can be used straight out of the box - just photocopy the sheet, cut out the cards and you have a ready-made lesson. One or two of the games contain some complex clues which I prefer to rewrite, but there is a blank set of cards included which makes this very easy to do.
The topics cover all strands of the national curriculum - number, algebra, geometry and data handling - and are suitable for levels 5 through 8.
Highly recommended as a way of adding variety and group-working skills to maths lessons.