Advanced Dungeons & Dragons D&D Ravenloft Monstrous Compendium Appendix III: Creatures of Darkness.  c1994 TSR #2153.

The book is in excellent - near mint condition with light cover wear as seen in the detailed photos. No writing / markings.

Something moves in the darkness.
Your heart pounds.
Death is upon you before you know it.

Inside this book are dozens of sinister beings waiting to strike terror into the hearts of role-players everywhere. From the dreaded scarab beetles of Har'Akir to the archer skeletons of Darkon and the drow vampires of Arak, these Creatures of Darkness will provide hours of diabolical adventure. But be warned--if you buy this accessory, your AD&D game players may never forgive you.