The books you need for this course are four paperbacks, total cost just over $40.
Sidereus Nuncius, by Galileo Galilei, translated by Albert van Helden, University of Chicago Press.
Relativity: The Special and General Theory, Albert Einstein, Crown Trade paperbacks, New York.
Ideas and Opinions, Albert Einstein, Crown Trade Paperbacks, New York.
Uncommon Sense, Alan Cromer, Oxford University Press.