This is a truly hilarious book.  We have read Pyramid, Castle and Cathedral not to mention The New the Way Things Work by the same author.  All were great educationally and were enjoyable books but this one is more enjoyable than all the others put together.  Perhaps it is a little less educational.  It is definitely way sillier.

A man is walking across North America in the distant future, long after a sudden, tragic meteorological occurance buried the whole continent under many feet of...junk mail.  He falls into a motel but he interprets the place as a tomb and the many items in it and the adjoining bathroom as ceremonial items.  Truly hilarious.  My favorite is the "decorative tiles" on the ceiling which were carefully colored in random patterns (really, they were water stains!).