Leizarraga published three books, all in 1571: Iesus Christ Gure Iaunaren Testamentu Berria (The New Testament of Jesus Christ our Lord) Kalendrera (a calendar of religious holiday) ABC edo Christinoen instructionea (ABC or the Christian's Instruction) The most famous of these undoubtedly is the Testamentu Berria which even today is known as "Leizarraga's New Testament".
Leizarraga je objavio 3 knjige, sve godine 1571.: "Iesus Christ Gure Iaunaren Testamentu Berria" ("Novi zavjet Isusa Krista Gospodina našega") "Kalendrera" (kalendar vjerskih blagdana) "ABC edo Christinoen instructionea" (ABC ili upute kršćanima) Naslavnije od njih je, bez sumnje, "Testamentu Berria", danas poznato kao "Leizarragin Novi zavjet".