The God Factor: Inside the Spiritual Lives of Public People

When religion reporter Cathleen Falsani climbed aboard Bono's tour bus, it was to interview the rock start about AIDS awareness. Instead, they plunged into a lively discussion about faith. "This is a defining moment for us," Bono said. "For the culture we live in."

Spirituality clearly now plays a key role in the United States. But what is also clear is that faith is a more complex issue than snapshots of the country convey. Jesus. Buddha. Kabbalah. Angels. This may be a nation of believer...