Artist Mark Menjivar was in an antique bookshop in Fort Wayne, Indiana, when he found 4 four-leaf clovers pressed between the yellowed pages of an aged copy of 1000 Facts Worth Knowing. Their discovery beguiled Menjivar so much that he began a multiyear exploration into the concept of luck and its intersections with belief, culture, superstition, and tradition in people's lives. Menjivar has spent hours and days engaging people in airplanes,...