Let me run down the basic facts:
- A 26 point guide for pimping out your dungeons
- Kickass random die charts on damn near every page
- Chock full of awesome art by Otus, Roslof, Holloway, Mullen and others
- Only $9.99!
- In distribution, so you can get it from your local game store.
Even with those two gripes I still feel confident saying that every GM fond of random die charts and dungeon adventures should own The Dungeon Alphabet, no matter what system you use. Get in contact with your local store owner to order a copy. If you don't have a local store you can get it from Paizo, Amazon or straight from Goodman Games.