These Micro Chapbook rpg's are pretty fun, basic little self contained dungeon crawler games. This expansion kicks it up a notch by adding overland mapping, with a persistant landscape to set your dungeons in. Towns are available as well, in the form of dungeon names (individual Micro Chapbooks) that are randomly rolled from whichever books you have in your collection. There are even random wilderness encounters (with new monsters!) and rules for hiring companions to adventure with.

If you enjoy these games, pick up EotR. Lots of good stuff in there.