The gang is planning a surprise for Puppycorn, so they spell things out when talking so he won't find out. Desperate to know what they're saying, Puppycorn finds a magic book that he thinks will help him learn to spell.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.