The Glorious Golden Ratio by Alfred S. Posamentier.  2012, ISBN 978-1-61614-423-4. If you are interested in Mathematics then you'll love this book. The golden ratio is a number which occurs in geometry over and over again. The golden ratio is also related to the Fibonacci and Lucas numbers. This book discusses how to construct the golden ratio, how it has been used in the past and gives many examples of it in geometry. Purchased at Powells books, on 1-21-2012, for $27.00.