The Pope recommends earnest study of the Catechism of the Catholic Church, calling it "a precious and indispensable tool". This book is only a help and further simplification to prompt one to read the official Catechism. Part-I deal with the Creed while Part-II deals with apologetic questions. It provides needed knowledge and arguments to answer questions raised against one's faith, coming either from our mind or from others.
Simple Explanation of the I Believe
FR. B. JOSEPH FRANCIS