What if you had the chance to kill Adolf Hitler as a baby—would you take it? For The New Republic’s editor, Michael Tomasky, the famous thought experiment offered the starting point for his debut novel, Killing Baby Hitler, an eccentric journey through history, counter-histories, and a dark future that bears an unsettling resemblance to our present. In the world of the book, the climate has dramatically worsened; humans rely on (and sometimes have sex with) robot companions called filos ; and