Michael Tenenbaum's book "Blessed Assurance?" Revised and expanded. This book is an excellent challenge to dogma and the idea of biblical infallibility, but it's also so much more. It explores the sort of questioning and reasoning that goes on within a person facing the possibility that what he or she has believed isn't true. Sometimes even the most diehard believers come to realize their faith has been misplaced. What's involved in that process? Sometimes the most diehard non-believers assume that even though they don't believe Christianity is true, it can't be proved with certainty that it's false. But what if it can be?