Perhaps the book's title is misleading - it should have been "Follow the Old Testament as Literally as Possible." Once he ventured into NT territory, the story got dry. He didn't try quite as hard to satisfy the rules as the NT... i.e., following Jesus. 
 The book as a whole was decent enough, but lacked in the actual point of following these laws (that is, the actual "following God's laws" part). He could have picked up any set of laws and done the same thing.