Well, I have several anthologies of my articles on Amazon that go back to 2011, when I started writing them. I have two more I'm getting ready, one that focusses on religion, the other on atheism and secularism. These two will include mostly the more recent articles on Medium.
I also have a philosophical zombie novel called "God Decays."
You can find links to this stuff and to my old YouTube videos and poetry on my blog (link below). Check back there for links to the two new anthologies when they're ready, or I might somehow put out a notice on Medium. (I think the Amazon links on my blog appear only in the non-mobile version.)
But the book I'm working on now might be my magnum opus, if I do say so myself. It's a novel with a huge scope that will consist mainly of philosophical dialogues. I've only written the first two chapters, though.