PA Vol 6: The Halls Below Hardcover (Limited Edition)
The final volume of the Penny Arcade Hexology, the full extent of its powers is not yet known.
This book is the same as a regular Book Six, except is has a firm exoskeleton and is signed and numbered. That is to say, it is better, and there are only 1000.
A collection of all Penny Arcade strips from 2005