Book excerpt: Bestselling author and apologist takes on one of the most difficult questions Christians face. How can an omnipotent, loving God preside over a world filled with evil and suffering? The author's approach is concise, systematic, and clearly communicated, just what Geisler fans have grown to expect. In addition to relying on time-tested solutions to the problem of evil, the author also presents a compelling new way to think about this puzzle.