CRC II and the New Testament are both good but more geared toward kayakers (and sandbaggers, but that's another story...). For rafting, a great book, if you can get your hands on it, is Western Whitewater. This guidebook covers all the major rivers in the State that you'd want to raft, and for many has descriptions of individual rapids in the narrative.
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse