There’s a strange book from 1934 calledCain’s Jawbone that's "not for the faint-hearted.” It’s part puzzle, part murder mystery. And it’s only been solved three times. You can find the bookhere. Say hello on Twitter, Facebook and Instagram. Sign up for our occasional newsletter, The Accomplice. Follow the show and review us on Apple Podcasts: https://apple.co/2BmMZr5 We also make Criminal and Phoebe Reads a Mystery. Artwork by Julienne Alexander. Check out our online shop. Episode transcripts are posted on our website. Learn more about your ad choices. Visit podcastchoices.com/adchoices