This is sillier than A Hitchhiker's Guide to the Galaxy, but the jokes are hyperpedantic and theological rather than technical and sociological — OK, a bit of literate silliness can be fun. But this is the kind of copophragic humor and irreverence I remember from 1st grade, when we thought "underwear" was a terribly funny and naughty thing to say. Here the naughty joke is that "Dog" is "God." And maybe Satan isn't so bad.
Other reviewers have loved this book (see the publisher's Journey to Virginland page), so maybe you will too.