"Polly Oliver's Problem" is a famous book by the American writer Kate Douglas Smith Wiggin. This is a moving and funny story about a girl, Polly Oliver, who, wanting to help her family, decides to pretend to be a boy. Readers follow Polly along with her adventures and the hilarious situations she finds herself in while refraining from revealing her true self. Full of warmth and humor, the book, in addition to the entertainment plan, also carries important educational points and helps to think about the equality of the sexes and the ability of each person to be himself. "The Polly Oliver Problem" is an interesting read for children and adults that will forever remain in the heart of everyone who values friendship, courage and loyalty to themselves.