I got this old book from a friend, titled "Central Casting: Dungeons" yesterday night. My friend is my player and he's noticed how much I struggle to make decent dungeons.
Though the book is actually good and it's fun to read, it's not what I'm looking for since it's just a collection of random dungeon tables, and it only works for creating man made complexes; no caves, no supernatural dungeons, no deathtraps... just Tombs and Castles.
I've been searching for a book similar to "D&D for Dummies" or such that teaches the basics of dungeon designing, such as deciding what to place, structures, etc. Most sources assume that dungeons must be inhabited by sentient creatures, which at least for my tastes is boring. I just have no experience with dungeon-based campaigns and I need a lot of help.
I'm looking for a system-agnostic book that
… helps me understand how or why to place dungeons in a campaign
… has examples
… will help me understand about general trap and monster placement
… that covers more than man-made settlements