Sort of read: Developing Grip Strength by David Gentle and David Webster, 1986, 0947655085.
This is half exercise advice and half strong man history. The stories of strong feats-of-strength are interesting but not so helpfull. Some of the exercises are also interesting but unhelpfull. Breaking matches and pencils, bending bottle caps, and tearing card decks in half are not very practical.
Still, there are some good exercises I have been using. Soon I will have the grip powers of an ape!