One book many engineers have cut their teeth on for OS would be Andrew Tanenbaum's Modern Operating Systems, 3rd ed.

http://www.amazon.com/Modern-Operating-Systems-Andrew-Tanenb...

Either I'm missing something or this tutorial is seriously lacking.

I'd much recommend Tannenbeum's classic text that covers implementing Minix: http://www.amazon.com/Operating-Systems-Implementation-Prent...

But since this text is rather old, it doesn't have some of the later developments in OS. So for that additional material, I'd recommend his latest book to have at your side: http://www.amazon.com/Modern-Operating-Systems-Andrew-Tanenb...