My son was introduced to Mr Men books by a teacher in school who would read for them making funny faces and noises, as if acting the book. He would get home telling me about the stories and asking me to buy it. Finally I bought the whole box and he read all the books in one week. After this, he started reading other books much more than before. I think Mr Men books showed him the real pleasure of reading.
He even told me the "story" on how Roger Hargreaves started the first Mr Men (Mr. Tickle) book.
Great!