The current (2012, updated) edition of my book is here. It is suitable for two-sided printing or for viewing in a pdf reader. Hyperlinks appear throughout the document, so within a reader you can click on a page number in the index, click on a reference to a figure, and so on.
This page is open to everyone at Amherst College and to students in Amherst courses. You're welcome to link to this site or download a copy for your own use. Please do not distribute this book without permission.
Any comments or suggestions would be greatly appreciated. Corrections will appear below.