From December 1st through December 24th I published a new article here, covering a variety of topics that will be of interest to Swift developers. Each day also came with a discount on something useful to Swift developers, but those discounts have now expired.
Here are all 24 Swiftmas articles:
Paul Hudson is the creator of Hacking with Swift, the most comprehensive series of Swift books in the world. He's also the editor of Swift Developer News, the maintainer of the Swift Knowledge Base, and Mario Kart world champion. OK, so that last part isn't true. If you're curious you can learn more here.