If your four-year-old told you about a trip to heaven, would you believe them? For a pastor named Todd Burpo, the answer was yes. In 2010, his book Heaven Is For Real—co-authored by Lynn Vincent—became a runaway bestseller. This week, Sarah tells In Bed with the Right co-host Adrian Daub the story of this strange little book, and how it reveals more about us than it does the afterlife.…