García Lorca's first book of poems, "Libro de poemas", was published in 1921, collecting work written from 1918 and selected with the help of his brother Francisco (nicknamed Paquito). They concern the themes of religious faith, isolation, and nature that had filled his prose reflections. Early in 1922 at Granada García Lorca joined the composer Manuel de Falla in order to promote the Concurso de Cante Jondo, a festival dedicated to enhance flamenco performance. The year before Lorca had begun to write his "Poema del cante jondo" ("Poem of the Deep Song," not published until 1931), so he naturally composed an essay on the art of flamenco, and began to speak publicly in support of the "Concurso". At the music festival in June he met the celebrated Manuel Torre, a flamenco "cantaor". The next year in Granada he also collaborated with Falla and others on the musical production of a play for children, "La niña que riega la albahaca y el príncipe preguntón" ("The Girl that Waters the Basil and the Inquisitive Prince") adapted by Lorca from an Andalusian story. Inspired by the same structural form of sequence as "Deep Song," his collection "Suites" (1923) was never finished and not published until 1983.