Here are four great Christian books you should know, abridged and lightly updated for ease of reading: Check out "The Essential Christian Classics Collection, "containing "The Christian's Secret of a Happy Life" by Hannah Whitall Smith, "Foxe's Christian Martyrs" by John Foxe, "In His Steps" by Charles M. Sheldon, and "The Pilgrim's Progress" by John Bunyan. These books own a well-deserved status as Christian classics, having challenged and encouraged readers over the past four centuries. Now, they're shortened and simplified for today's busy reader