The Grolier Poetry Book Shop ("the Grolier") is an independent bookstore on Plympton Street near Harvard Square in Cambridge, Massachusetts, United States. Although founded as a "first edition" bookstore, its focus today is solely poetry. A small (404 sq ft (37.5 m2)), 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.