The Book of Holding (Dungeons & Dragons)

The Book of Holding (Dungeons & Dragons): A Blank Journal with Grid Paper for Note-Taking, Record Keeping, Journaling, Drawing, and More

The Worldbuilder's Journal of Legendary Adventures (Dungeons & Dragons): 365 Questions to Help You Create Mythical Characters, Storied Worlds, and Unique Campaigns

The Game Master's Book of Traps, Puzzles and Dungeons: A punishing collection of bone-crunching contraptions, brain-teasing riddles and ... RPG adventures (The Game Master Series)