Paizo Publishing will release Pathfinder Campaign Setting: Giants Revisited on April 18, 2012.  The 64-page full color softcover is the latest in the Pathfinder “Monsters Revisited” series, which also includes Classic Monsters Revisited Classic Horrors Revisited, and Undead Revisited.  
This sourcebook will include info on the societies, ecologies, mythologies, and secrets of ten different kinds of giants: hill giants, stone giants, frost giants, fire giants, cloud giants, storm giants, rune giants, marsh giants, taiga giants, and cyclopes.  Each chapter will include stats for a sample leader or jarl plus new rules like feats, spells and magical items not just for the monsters but also for those that battle against them.