The Prodigal Son, By Fr. Michael Mueller, C.SS.R.
An abridgement of one of Fr. Mueller's classics. Discusses what causes people to lose the Faith--e.g., impurity, drunkenness, bad books--giving numerous true stories. Also covers the misapprehension of God's mercy, delay of conversion, how to come back to the Sacraments and why, contrition, the necessity of Confession, the value of General Confession, etc. Really moves the heart--as do all Fr. Mueller's books!