You can buy Hannah's great book Hello World from loads of places: http://www.hannahfry.co.uk/helloworld Including signed copies on Maths Gear! https://mathsgear.co.uk/collections/books/products/copy-of-signed-copy-of-hello-world My book Humble Pi is available signed on Maths Gear, as well as un-signed from all the usuals. SIGNED https://mathsgear.co.uk/collections/books/products/humble-pi-a-comedy-of-maths-errors UNSIGNED https://www.amazon.co.uk/Humble-Pi-Comedy-Maths-Errors/dp/0241360234/ref=sr_1_1?_encoding=UTF8&tag=stanupmath-21 The history of Thomas Bayes. http://www-history.mcs.st-andrews.ac.uk/Biographies/Bayes.html All about the theorem named after them. http://mathworld.wolfram.com/BayesTheorem.html Huge thanks to the current residents of the house who tolerated us running around and invading their weekend. All in exchange for two awesome maths books. Thanks to Ben Sparks for crafting the Geogebra animation of the surface. CORRECTIONS - Nothing yet unless you count a slight continuity error with the door in the background. Let me know if you spot anything more serious than that! Thanks to my Patreon supports who do support these videos and make them possible. Here is a random subset: Christian Schadewald Thomas Hodnemyr Richard Fourie Maksym Borodin Laura Dale Support my channel and I can make more maths videos: https://www.patreon.com/standupmaths Music by Howard Carter Filming and editing by Trunkman Productions https://trunkman.co.uk/ Sound production by Peter Doggart Design by Simon Wright Runner and assistance by Max MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ NEW BOOKk: http://wwwh.umble-pi.com/ Nerdy maths toys: http://mathsgear.co.uk/