The Fountain head - this is probably the greatest book I've ever read (comes real close to Animal Farm and 1984). Ayn Rand has written a master piece. In fact, this book even contributed a few phrases to the English language - notably, "The Roark effect" and "Objectivism".
Anyways, don't miss this book - for what ever reason. The main characters are Howard Roark - a brilliant architect who is up against the system, best represented by his friend Peter Keating and newspaper columnist Ellsworth Toohey. I could not put the book down once I started reading it (and it took me most of two days to finish it.)
There are two classic monologues in the book - the first when Ellsworth Toohey explains his philosophy to Peter Keating and the second, when Howard Roark defends himself. These are must reads for any sociology student.