This is a book about Venn diagrams, tools of logic that can be used for sorting objects or ideas into categories. In this book, the diagrams are used to sort marbles, to group the roller skaters and ice skaters, to help the host at a party unravel a complicated set of orders for ice cream, and even to point to the solution of the mystery of a disappearing piece of pie at a beach house.

The diagrams are introduced in their simplest form—two separate circles defining two separate categories, but by the end of the book, the reader is working with three overlapping circles defining seven categories.

Robert Froman introduces Venn diagrams in a lively, inviting manner with examples that could easily be found in real life. His clear writing, combined with Jan Pyk's amusing and precise illustrations, make the book a pleasure to read.

As in all Young Math Books, this is a rather sophisticated subject, introduced on an easy-to-understand, enjoyable level for the youngest of mathematicians.

From the dust jacket