How do you say goodbye to a beloved detective? Agatha Christie, of course, made a mystery out of it. Thanks to my guest, Mark Aldridge. You can find out more about his work at markaldridge.info and order a copy of his new book, Agatha Christie’s Poirot: The Greatest Detective in the World, from all good booksellers. Spoiler warning: there are major spoilers for Curtain and Sleeping Murder by Agatha Christie in this episode. To see a full list of books mentioned in this episode and get links to other resources related to this topic, please visit shedunnitshow.com/swansong. Thanks to today’s sponsor, Best Fiends. You can download Best Fiends free on the Apple App Store or Google Play. To be the first to know about future developments with the podcast, sign up for the newsletter at shedunnitshow.com/newsletter. The podcast is on Twitter, Facebook, and Instagram as @ShedunnitShow, and you can find it in all major podcast apps. Make sure you’re subscribed so you don’t miss the next episode. Visit shedunnitshow.com/open to open the show now in your default podcast app. Find a full transcript of this episode at shedunnitshow.com/swansongtranscript Music by Audioblocks and Blue Dot Sessions. Learn more about your ad choices. Visit megaphone.fm/adchoices