Rob Boyd and I have coauthored a textbook entitled How Humans Evolved which is designed for use in introductory classes in human evolution and biological anthropology. This text differs from others in several ways:
The fifth edition of How Humans Evolved (2009) is now available. The book is also available as an e-book, and instructors can create custom e-texts with a selected set of chapters.
For more information point your browser to the How Humans Evolved page at the W.W. Norton web site