Keeper's Compendium is a 1993 role-playing supplement for Call of Cthulhu published by Chaosium.
Keeper's Compendium is a supplement in which forbidden knowledge is presented for the gamemaster.
Wayne Ligon reviewed Keeper's Compendium in White Wolf #48 (Oct., 1994), rating it a 4 out of 5 and stated that "This is one of the best reference works a Keeper can have."