His autobiography, "In the Arena", is most certianly worth giving a read. It gives some very facinating insight into the movie industry of the time. A used copy can be picked up for next to nothing. I got a hardcover copy in perfect condition for $0.99 + shipping from amazon a while back.

Among my favorite movies of his are Planet of the Apes (of course), Soylent Green, and The Omega Man.

The later two are certianly not fantastic works of art, but they are really fun to watch, and Heston did a great job in those kinds of roles.