The book "Diario de un combatiente" (Diary of a Combatant), a journal written by Argentine-born guerrilla leader Ernesto "Che" Guevara, was presented to the public Tuesday in Havana, dpa reported.
The journal, published for the first time, holds "inimitable moments of armed struggle in Cuba," publisher Ocean Press said.
It is an account of Che's experiences on the Sierra Maestra 1956-58, prior to the triumph in early 1959 of the Cuban Revolution led by Fidel Castro.
Earlier published journals of the revolutionary leader were the basis for the recent film, Motorcycle Diaries, which recounted Che's time travelling across Latin America and working as a physician before he arrived in Cuba.
The presentation took place on the day when Guevara (1928-67) would have turned 83.
"The high documentary and human value that comes from reading it provides a closer understanding of Che's perceptions about the Cuban reality, its culture, identity and political context," the publisher said.