Most Americans know C.S. Lewis wrote The Chronicles of Narnia. Fewer know that in the late 1930s he wrote science fiction set on Mars and Venus. More to the point, on this Veterans Day, 2020, C.S. Lewis served as an infantry officer wounded at the Battle of Arras in 1917. I am indebted to Baen books’ publisher Toni Weisskopf for pointing me to Lewis’ 1946 essay, Talking about Bicycles. As you may suspect, Lewis writes not about bicycles but about the four ways in which author