From the back cover:
Terror and Beauty Join Forces
Long have their ways remainded hidden to outsiders, veiled by the mysterious Shadow Rift. Who are these creatures -- called Arak by some, ellefolk by others, shadow fey by most? What are their motives and what threat do they represent to the lands that border their realm?
Continuing the tradition of the Van Richten's Guides, this volume reveals these elusive creatures in all their sinister beauty. Discover the history and customs, unlock the magic and mystery, of the shadow fey. Those who dare to pursue these beings may discover the strengths and weaknesses of those they hunt. A section for DMs gives guidelines for creating new shadow fey and ideas for using them in Ravenloft campaigns.
Requires the use of the Dungeons and Dragons Players Handbook published by Wizards of the Coast. This product utilizes updated material from the v3.5 revision. The Ravenloft campaign setting is an officially licensed Dungeons and Dragons property.