Paizo Publishing will release Lost Kingdoms, a new Pathfinder campaign setting book, in May.  Lost Kingdoms centers around six lost and legendary empires from Golarion’s past that still influence events in the campaign world.  The setting book includes details on the ruined ziggurats of the Ghol-Gan, the pyramids of Osirion, and the megaliths of Thassilon, as well as three other empires.  Each kingdom is described along with adventure hooks, new treasures, and unique guardians to defend them. 
 
Lost Kingdoms will be a 64-page softcover book with full color interiors at $19.99.