From publisher blurb:
Within this volume are sixteen dark lords and ladies, each a prisoner of Ravenloft. Some are new to the setting, yet all may seem hauntingly familiar, for they have been lurking at the edge of your nightmares, waiting for the chance to emerge in your campaigns.
The Headless Horseman, the Phantom Lover, the Vampire Panther—these and other malignant forces await. You'll read ghastly tales of their past and grim accounts of their present. You'll visit their dark domains and tour the horrid sites portrayed in ten full-page maps.
The Shadows are lengthening; the air is growing chill. The Darklords are calling. Their voices are carried by the Mists of Ravenloft, and you have little choice but to answer.