Sam's guest in this week's Book Club podcast is Adam Higginbotham, whose new book Challenger: A True Story of Heroism and Disaster on the Edge of Space describes the 1986 space shuttle disaster that took the lives of seven astronauts and, arguably, inflicted America's greatest psychic scar since the assassination of JFK. He tells Sam about the extraordinary men and women who lost their lives that day, the astounding engineering involved in the spacecraft that America had started to take for granted, and the deep roots and long aftermath of the accident.