Lucy Maud Montgomery wrote fantastic books.
Montgomery published Anne of Green Gables in 1908. It was her first novel, and it was wildly successful. It allowed her to continue writing the rest of her life. She went on to publish 20 novels, 530 short stories, 500 poems, and 30 essays.
She's remembered most for Anne and the subsequent novels in her series. However, she also wrote Emily of New Moon and The Story Girl, two other children classics.
She might not have been a pioneer, but without her, the landscape of children's literature would look very different.