His first writings, published between 1844 and 1849 are:
The biography of Comollo (1844)
The devotee of the Guardian Angel (1845)
History of the Church (1845)
In 1853 he launched the first popular magazine, "Letture Cattoliche - Catholic Readings"; in 1861 he began the first printing press, which published various series of books for youth and in 1877 published the first issue of the Salesian Bulletin.
The published works, between 1844 and 1888, are over 220 and are collected in 38 volumes.
There are 170 major works, including books and booklets, but the catalog of his writings (between books and brochures) reached the number of 403 titles.
In 1949 Pope Pius XII proclaimed him patron of Catholic publishers.