Consists of personal and working papers of Mario Vargas Llosa. Included are manuscript first drafts (see Notebooks), typescript drafts, and some galley and page proofs with holograph corrections of the novels La tía Julia y el escribidor , La guerra del fin del mundo, La ciudad y los perros, La casa verde, Pantaleón y las visitadoras, Conversación en la catedral, Historia de Mayta, El hablador, ¿Quién mató a Palomino Molero?, and Elogio de la madrastra ; drafts of the short stories collected under the title Los jefes ; and notes and second and later drafts with holograph corrections of the plays La chunga, La señorita de Tacna, and Kathie y el hipopótamo . Also included are several drafts of the film scripts "La guerra de Canudos" (1967-1972), and "Pantaleón y las visitadoras", notes and drafts of scripts for the television program "La Torre de Babel", hosted by the writer, notes and manuscripts of essays, articles, speeches, and lectures. There is also material about the author, such as interviews (two video-recorded), essays, and newspaper clippings.

The extensive correspondence covers the period 1957 to 1994, and includes letters from family members, publishers, and a wide range of renowned writers such as Jorge Amado, José María Arguedas, Carlos Barral, Mario Benedetti, José Bianco, Julio Cortázar, José Donoso, Rosario Ferré, Carlos Fuentes, Gabriel García Márquez, Ana María Matute, Pablo Neruda, José Emilio Pacheco, Nelida Piñon, Carlos Quijano, Augusto Roa Bastos, Sebastián Salazar Bondy, Manuel Scorza, and others.

The political archive consists primarily of correspondence between Vargas Llosa and his wife, Patricia, and other politicians, nonprofit organizations in Peru and other Latin American countries, diplomats, and the general public while he served as a leader of Movimiento Libertad [Liberty Movement], a civic organization which was founded in Peru in 1987, and as the presidential candidate of Frente Democrático (FREDEMO) [Democratic Front] in 1989 and 1990. Vargas Llosa lost to Alberto Fujimori, candidate of the Cambio 90 party in the second round of elections held on June 10, 1990. The archive includes correspondence between Vargas Llosa and leaders of Movimiento Libertad and FREDEMO. Political correspondents include Luis Bedoya Reyes, Fernando Belaúnde Terry, Luis Bustamante Belaúnde, Miguel Cruchaga, Jorge Salmón Jordán, Miguel Vega Alvear, Pedro Pablo Kuczyinski, Enrique Ghersi Silva, and Fernando de Szyszlo. The General Correspondence includes many letters with suggestions on how to improve the economic conditions of Peru, on why they are voting for him as president, and with lists of names with signatures and voter identification numbers. Included in this correspondence are political slogans, poems, drawings, horoscopes, newspaper clippings, and some photographs and maps.

The collection also includes a series of additional papers that are being gradually processed, which contain correspondence, articles, drafts, proofs, notebooks, audio cassettes containing interviews, and other materials.