Leo Marks Shares His Experiences as a Codemaker in World War II.

Lance's new book, Chamber Divers, is about research conducted by scientists at University College London before and during World War II — including protocols for operating the miniature submarines used on scouting missions in advance of D-Day.

Peter Pomerantsev co-founded a project recording Russian atrocities in Ukraine to combat Russian disinformation. His new book profiles a WWII propagandist who targeted the Nazi regime.

Psychedelic science began much earlier than you may think - back in the 1920s and '30s. At the center of that research was Margaret Mead, the famous anthropologist, and her third husband, Gregory Bateson, one of the most controversial anthropologists of his time. That early history is covered in the new book by my guest, Benjamin Breen. The book is called "Tripping on Utopia: Margaret Mead, The Cold War, and the Troubled Birth of Psychedelic Science".