From the back cover of the PDF:
Faster Monkey’s tribute to a classic dungeon crawl gives you tons of old-school goodness — rooms and tunnels, wandering monsters, traps and treasures — in a fast-playing modern form. “The Hidden Serpent” pits low-level Labyrinth Lord™ characters against a secret complex full of varied foes, some working together and some at odds.
More than other Faster Monkey products, this dungeon emulates the humor and zaniness of modules from the hobby’s golden age, hitting the party with plenty of classic risks and rewards.
“The Hidden Serpent” is a 20-page dungeon, plus two pages of maps, two color covers, and two player handouts. It’s fully compatible with Labyrinth Lord™ and the Advanced Edition Companion™, and works easily with other old-edition-style games. Pick it up today for a ready-to-run adventure tonight!