Celebrated Puerto Rican novelists who write in English and Spanish include Giannina Braschi , author of the Spanglish classic Yo-Yo Boing ! and Rosario Ferré , best known for Eccentric Neighborhoods Puerto Rico has also produced important playwrights such as René Marqués , Luis Rafael Sánchez , and José Rivera and New York based poets such as Julia de Burgos , Giannina Braschi and Pedro Pietri , as well as various members of the Nuyorican Poets Café .