Amazon.com Book Description (ISBN 0201328410, Paperback)

The spectacular success of the book and audio versions of Six Easy Pieces caused a worldwide clamor for more. The result is these six additional lectures, which the legendary teacher and Nobel physicist Richard P. Feyman gave in the early 1960's to freshman Caltech students. Though slightly more challenging than the first six, these additional lectures are more focused, delving into the most revolutionary discovery in twentieth-century physics: Einstein's Theory of Relativity.