The Grolier Poetry Bookshop ("Grolier's") is an independent bookstore on Plympton Street near Harvard Square in Cambridge, Massachusetts, United States. Although founded as a "fine-arts" bookstore, its focus today is solely poetry. A small (404 sq. ft.), one-room store with towering bookcases, it lays claim to being the "oldest continuous bookshop" devoted solely to the sale of poetry and poetry criticism. The only other for-profit store in the United States devoted solely to poetry is Open Books, in Seattle.