Don Félix Sardà y Salvany: – was born on May 21, 1844 in Sabadell, Catalonia, Spain. He was a Catholic priest and writer who wrote against Liberalism which he considered a grave sin. He was the editor of the weekly Spanish Catholic magazine ‘La Revista Popular’ for over forty years. He died on January 2, 1916 at the age of 71. This book, Liberalism is a Sin, is particularly relevant to the times we live in today where Liberalism permeates every aspect of our society and has deeply infiltrated the thinking of many of the Catholic hierarchy.