My friend Andrea set up a facebook page over here: https://www.facebook.com/AntonsOpenGL/. I believe it's mostly just a traffic director as it gets a few hits but not comments! I haven't looked at Vulkan yet. I want to see how it catches on across different operating systems and if there's interest in the indie/student area first. I think my next project will be dissecting my video game with some videos/tutorial type stuff as there seems to be plenty of interest there. I'm just finishing the Steam build at the moment. Good luck.
End of June. Right. I helped a friend move ($$) to California, which put a hold on a lot of things. I am looking forward to getting started on this. With ASUS announcing the new laptops with gtx1070 graphics, I believe the wait will be worth it. I expect to place my order within 4 weeks, so starting the book around the end of September is a more realistic time frame. I will be purchasing some games to get an idea of what the OpenGL game capabilities are as I would eventually like to participate in a gamejam.