What or Why
I consider myself a blog/github/tutorial - learning guy, these are awesome and can help us have a nice glance of what the thing behaves or looks like, every now and then I think myself less organized or systemic and want to know what the things's why and how are.
So, I go back to some classical books and start a long and challenge journey. Great changes are that I will stop half way, it's still worth a new repo here. ^_^
Good luck and have fun.