"Bits of Darkness: Caverns" is a handy product that I will be making good use of in my home campaign. The bulk of the pages is devoted to a list of twenty "Cavern Shards" and 100 "Cavern Bits," each one a description of a room you might drop in a dungeon you are designing. These descriptions will be extremely handy for those rooms in which you want to put something special, but you just can't come up with a good enough idea.