English Summary/英文概要： This volume is a republication and expansion of the much-loved Wohascum County Problem Book, published in 1993. The original 130 problems have been retained and supplemented by an additional 78 problems. The puzzles contained within, which are accessible but never routine, have been specially selected for their mathematical appeal, and detailed solutions are provided. The reader will encounter puzzles involving calculus, algebra, discrete mathematics, geometry and number theory, and the volume includes an appendix identifying the prerequisite knowledge for each problem. A second appendix organises the problems by subject matter so that readers can focus their attention on particular types of problems if they wish. This collection will provide enjoyment for seasoned problem solvers and for those who wish to hone their skills.

Awards/获奖情况： The book is an expanded version of The Wohascum County Problem Book published by the MAA in 1993. While the title has changed, some problems -- old and new -- still draw from the (un)reality of that locality. There are now 208 problems vs 130 in the older edition. This unabashedly a problem collection in which the Solutions part takes about 85% of the book. The book is very thoughtfully organized. Each problem is followed by a solution page number; there are also three indices (a thorough term indes, prerequisites by problem number, and problem numbers by subject); that and the fact that about 25% of the problems come with more than one solution attest to the effort made by the authors and the sincerity of their desire to accomodate diverse skills and interests. On the whole, the book is very easy to work with. The metaphorical title A Mathematical Orchard is supposed to "evoke images of such good things as vigorous growth, thoughtful care, and delectable fruit..."

George T. Gilbert is an Associate Professor of Mathematics at Texas Christian University.

Loren C. Larson is an Emeritus Professor of Mathematics at St Olaf College, Minnesota.