This Guidebook is now out of print, and unavailable
The most definitive guidebook for Yosemite Valley. Currently out of print, though lots of second hand copies around.
The guide often doesn't give too much away as to the nature of the listed climbs, though starred routes in this book are generally of good quality, or at least have some good pitches. Exploring some of these routes can be a good way to find solitude in areas of the valley less travelled.
Beware the generic gear recommendation of "Pro to 3 inches". This probably often accurately reflects the rack of the first ascensionist but doesn't always describe the rack required to comfortably protect the route.