The old new thing[1]. It's a blog, but he did also publish a book[2] compilation of some choice blog posts. The book is from a few years ago, so some specifics might be outdated, but I think a real strength of the blog is how, despite being very targeted, focusing on specifics of one OS, it's also very general. I also just really like Raymond Chen's writing style.
I agree that this is a fun book/blog, but I would recommend anybody trying to learn Windows system programming to look elsewhere. This is more like a collection of fun bugs and weird design decisions.
True, it's not something you would sit down and read through. Subscribing and passively consuming will filter knowledge in over time though. I keep my copy of the physical book in my bathroom :p