From the back of the book...

Prepare for the adventure of two lifetimes!

Still pining for the dungeoneering days of your youth? Yearning for one epic adventure that can take your party from lackey to legend?

The ultimate challenge has finally arrived...

Over 1600 encounters - A mammoth dungeon unlike any other! Every monster in the SRD - and a few you’ve never heard of before! 16 poster sized maps - Enough to cover the entire game room wall! 840 pages of fantasy entertainment - Enough for an entire party to grow from levels 1 to 20, or enjoy 15 challenging dungeon adventures.

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Home made dungeons too time consuming to generate? Are you an old school dungeon crawler? Have you braved Undermountain so many times it's become as exciting as walking the dog?

This is the supplement for you!

An insanely large dungeon that, when all 16 map pieces are assembled, covers over 10 square feet. A single dungeon so immense most players give up before ever completing it.