St. Athanasius was the great defender of the Catholic Faith against the Arian Heresy. He was a bishop in Egypt in the fourth century. For his strong defense of the faith, he was exiled several times. He also wrote many books.
This biography of St. Athanasius is by Fr. Michael Molloy, an Orthodox priest. It gives great insight into the life of this great defender of the faith. It is published by Alba House and is 136 pages.