The Japanese Warrior Monks' Guide to Tidying Up

The Japanese Warrior Monks' Guide to Tidying Up is a book written by Japanese Warrior Monks to teach people to reach "the state of entidyment".

History
Several monks were handcrafting the book carefully when they were told that America had ordered a shipment of one million books. When they found this out, all the monks were fired and robots made the books in a factory instead. When one of the robots was told it had put two front covers on the book, it committed.

Marge bought the book at the Springfield Car Wash and made the family follow it, giving up everything that didn't give them joy any more. Homer was told to give up Plopper whilst Lisa gave up nearly all of her possessions.