Writer and veteran Brian Castner wanted to write about the war in Afghanistan, but he wasn’t able to get interviews with generals, politicians, or other high-profile figures. So he decided to write the book that only he could write. Brian Castner’s latest book, “All the Ways We Kill and Die,” is about his friend and Traverse City native Matthew Schwartz, who was killed by an explosive device in Afghanistan. The book is an investigation into finding the person who made the bomb that killed Schwartz. Castner talks this hour with actor, author, and fellow veteran Benjamin Busch.