'Imagine living in a world filled with despair and darkness, without a trace of hope or fulfillment. That, says Ravi Zacharias, is precisely what nonbelievers experience. Come along as he systematically examines atheistic positions on human nature, the meaning of life, morality, the ''First Cause,'' death, and more. Insightful and thought-provoking reading! 185 pages, softcover from Baker.'