Mary Mouse is a fictional character "imagined" by Enid Blyton, a prolific British children's author, in the mid 20th century. Mary Mouse is a mouse exiled from her mousehole who becomes a maid at the dolls' house, employed by Sailor Doll. The original publications were in an unusual format, 15 x softback pictorial. Due to the austerity and paper shortages of the times, during and after World War II, the first editions were cheaply made with simple colour illustration and stapled bindings overstuck with linen edging. Loved mainly by girls, this character's memory has lived on. The original books (published by Brockhampton Press of Leicester at a price of one shilling) are highly collectable, perhaps because few remain in reasonable condition. The books were immensely popular in Blyton's days and eventually sold one million copies.

Books