The Catholic Catechism of Pope Saint Pius X, first published in 1908, proofread and formatted for the Kindle.

Unlike other Catechisms addressed to priests and bishops, this compendium -- in question and answer format -- was intended as a brief, authoritative summary for the Catholic layman and the general public by Pope Pius X, later canonized in 1954.

A favorite resource of traditional Catholics, this book remains a classic of pre-conciliar catechesis.