Piedra de sol (Sunstone)

No book-club issue is documented. The principal trap is the Fondo de Cultura Económica 50th-anniversary FACSIMILE of the 1957 edition, published 2007 — it reproduces the original and is routinely mistaken for it; check for the 2007 facsimile statement. Documented later editions that are 'first thus' only include UNAM (1977), Gobierno del Distrito Federal (1990), and Instituto Vasco-Mexicano de Desarrollo (1997), as well as the poem's appearance within Paz's later collected volumes.