San Manuel Bueno, mártir (1930) is a nivola by Miguel de Unamuno (1864–1936). It experiments with changes of narrator as well as minimalism of action and of description, and as such has been described as a nivola, a literary genre invented by Unamuno to describe his work. Its plot centers on the life of a parish priest in a small Spanish village. It was written in a period of two months at the end of 1930 along with two other stories, and was included on the Index Librorum Prohibitorum. The possibility that they may form a trilogy in three significant parts, or "partos" (births) as Unamuno suggested in the Prologue to the 1933 edition, has only recently been considered.