Saul Bass: A Life in Film & Design, by Jennifer Bass (his daughter) and Pat Kirkham (design historian) looks like a must buy.  Chock full-o-images, over 1,400, it should give you some brain marinade.  A mix of Picasso meets 60’s mod, I LOVE IT!  His style is so distinctive you can literally spot it a mile away. Only he could make title sequences compete with being the coolest part of the movie.