I am really enjoying Alan Page, (The Angry Weasel) who I mentioned in day 2. I have been reading his book, but hadn’t started reading the blog yet (which is essentially a compendium of blog articles that have been edited).
I learned automation from Nikolay Advolodkin’s awesome selenium / C# class and so I continue to check his blog at https://www.ultimateqa.com/blog/ to keep updated on what’s going on with him and his classes. He puts out free courses in addition to his paid ones.
I’ll check out some of the above given by @celinetester too. 