Tremendous and inspirational resources for gamemasters! Dungeon Denizens 2 is a huge hardcover with 350+ monsters, How to Write Even Better Adventures has advice from experienced game designers, and there's even more!
The original book of old-school RPG traps returns for 5E and DCC RPG! A compendium of catastrophic traps, sinister snares, engines of evil, and deadly devices with with full game stats for a folio of fearful fates.