Mr Mo is one of the nicest and most helpful residents in all of Dillydale. Then one day, he visits the barber for his regular snip, and falls fast asleep in the chair. When he wakes he discovers his mo is long gone – and so too are his manners. All of Dillydale is thrown off kilter, but as Mr Mo's moustache starts to grow back, the balance is restored.
Mr. Men is a series of 49 children's books by British author Roger Hargreaves commencing in 1971. Two of these books were not published in English. The series features characters with names such as Mr. Tickle and Mr. Happy who have personalities and physical attributes based on their names. From 1981, an accompanying series of 42 Little Miss books by the same author, but with female characters, were published, although nine of them were not published in English.
Each book in the original Mr. Men and Little Miss series introduced a different title character and his/her single dominant personality to convey a simple moral lesson. The Mr. Men and Little Miss characters frequently reappeared in other characters books. As of 2015, a total of 85 Mr. Men and Little Miss characters had been featured in series. The books' simple stories, with brightly coloured, boldly drawn illustrations, made them very popular, with sales of over 100 million worldwide across 28 countries.