The Complete Warlock
This was a variant of Dungeons & Dragons. It which originally appeared in issue #9 of ""The Spartan"" simulation gaming journal as an article entitled ""Warlock: or How to Play D&D Without Playing D&D"". It later appeared as a product from Balboa¸ Inc. It had two supplements¸ ""Warlock's Tower"" in 1979 (with new monsters¸ new rules for thieves¸ and many new magic items) and ""The Warlock Menagerie"" in 1980 (with over 100 new monsters and other new material). - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"