Pollyanna by Eleanor Porter

According to Wikipedia: Eleanor Hodgman Porter (December 19, 1868 – May 21, 1920) was an American novelist. Born in Littleton, New Hampshire, Eleanor Hodgman was trained as a singer but later turned to writing. In 1892, she married John Lyman Porter and moved to Massachusetts. Porter mainly wrote childrens literature, including three Miss Billy books (Miss Billy, Miss Billys Decision, and Miss Billy Married), Cross Currents (1928), The Turn of the Tide (1928), and Six Star Ranch (1916). Her most famous novel is Pollyanna (1913), later followed by a sequel, Pollyanna Grows Up (1915). Her adult novels include The Story of Marco (1920), Just David (1915), The Road to Understanding (1916), Oh Money Money (1917), Dawn (1918), Keiths Dark Tower (1919), Mary Marie (1920), and Sister Sue (1921); her short stories include Money, Love and Kate (1924) and Little Pardner (1927).