Trigonometric Delights by Eli Maor. 1998, ISBN 0-691-05754-0. This book is about Trigonometry. This is not a text book on trigonometry. I would say that to really appreciate this book the reader should have had some prior understanding of trigonometry and maybe some calculus. However, if you are interested in mathematics then you will probably enjoy this book. It is well written. It starts with the early history of mathematics that probably lead to trigonometry and follows the thread of history and how trigonometry as a science was employed at various times to solve problems.
Purchased at Powell's Books, 7-31-2002 for $23.50.