The different types of medieval CASTLES

There are thousands of medieval castles but which castle is what type? My novel, Shadow of the Conqueror Audio Book affiliate links: US: https://www.audible.com/shadbrooks UK: https://www.audible.co.uk/shadbrooks CA: https://www.audible.ca/shadbrooks AU: https://www.audible.com.au/shadbrooks Ebook, Paperback and Hardcover available from most major book retailers, here are a few of the main ones: Amazon affiliate link (be sure to navigate to your country's amazon site): https://amzn.to/2XErUaR Barnes and Noble: https://www.barnesandnoble.com/w/shadow-of-the-conqueror-shad-m-brooks/1132130546 Kobo: https://www.kobo.com/au/en/ebook/shadow-of-the-conqueror My official website: https://www.shadmbrooks.com/ Shadiversity on Patreon: https://www.patreon.com/shadiversity Awesome shadiversity T-shirts: https://teespring.com/stores/shadiversity