Stephen Barr, a theoretical physicist, argues that modern science is more compatible with religious faith than with scientific materialism—the view that physical reality is all that exists. Barr examines the major developments of twentieth-century physics—the Big Bang, quantum mechanics, the anthropic principle—showing how each complicates the materialist picture that science seemed to support. The Big Bang implies a beginning, which materialists had long denied; quantum mechanics introduces indeterminacy that challenges the clockwork universe; the fine-tuning of physical constants for life suggests design. Barr also addresses consciousness, free will, and abstract mathematical truth, arguing that materialist explanations remain inadequate. He engages fairly with opposing views while making his case that the Judeo-Christian understanding of a rational Creator explains the universe's intelligibility. The book is written for general readers, with physics concepts explained accessibly. For those interested in the relationship between science and religion, Barr provides a rigorous argument that they are not inherently opposed.