From the back of the book:
You have heard the rumors. Untold millennia ago, they ruled the land - their power and wisdom were legendary. Now their cities are gone, their might buried in forgotten ruins and hidden vaults. The Logheir built crystal towers that reached towards the skies, proclaiming their challenge to the gods themselves. The Tlacamoc served their Blood Gods, feeding them thousands of victims every year. The bards say their ancient kingdoms are no more. ...but now you wonder.
You hear new stories. Long-dead things stir in a half-buried pyramid. A mighty sword is discovered, attracting both treasure hunters and undead abominations. A chance encounter on a solitary road leads to the sick and decadent court of the last Logheir monarch. A friendly halfling village harbors soul-twisting horrors beneath its pleasant face. You vow to discover the secrets of the ancients, and survive to tell the tale...
Secrets of the Ancients presents a series of vignettes that can be used individually or together to enrich any fantasy campaign using the d20 game system.