Tyndale House, a major Christian publisher, has announced that it will stop selling “The Boy Who Came Back From Heaven,” by Alex Malarkey and his father, Kevin Malarkey. The best-selling book, first published in 2010, purports to describe what Alex experienced while he lay in a coma after a car accident when he was 6 years old. The coma lasted two months, and his injuries left him paralyzed, but the subsequent spiritual memoir – with its assuring description of “miracles, angels, and life beyond This World” – became part of a popular genre of “heavenly tourism.” Earlier this week, Alex...