Villains' Lorebook is an accessory for the Forgotten Realms campaign setting for the second edition of the Advanced Dungeons & Dragons fantasy role-playing game.

Character descriptions appear on pages 6–59, and include such notables as Artemis Entreri, Elaith Craulnober, Fzoul Chembryl, Halaster Blackcloak, Jarlaxle, Kymil Nimesin, Manshoon, and Szass Tam.

Pages 60–106 provides game statistics and descriptions for several monsters, as well as notable individual creatures like Errtu, Kazgaroth, and Tyranthraxus.

A number of organizations are described on pages 107-126, such as the Cult of the Dragon, the Drow of Menzoberranzan, the Red Wizards of Thay, and the Zhentarim.

The book, with product code TSR 9552, was published in July 1998, and was written by Dale Donovan.