Modernism is a heresy that was condemned by Pope St. Pius X (1903-1914). Yet it is the predominating error in the Catholic Church since Vatican II (1962-1965). This book exposes its errors. Called by St. Pius X the "synthesis of all heresies." St. Pius X commended the author of this catechism and expressed the hope that it would receive wide circulation. 160 pgs. PB