Summer - Edith Wharton

The story is one of only two novels by Wharton to be set in New England. The novel details the sexual awakening of its protagonist, Charity Royall, and shares many plot similarities with Wharton's better known novel, Ethan Frome. Only moderately well-received when originally published, Summer has had a resurgence in critical popularity since the 1960's. (Summary by Wikipedia)