Linux Core Kernel Commentary: Guide to Insider's Knowledge on the Core Kernel of the Linux Code

https://www.amazon.com/Linux-Core-Kernel-Commentary-Knowledg...

Understanding the Linux Kernel, Third Edition 3rd Edition

https://www.amazon.com/Understanding-Linux-Kernel-Third-Dani...

Are you thinking about the Linux Core Kernel Commentary? http://www.amazon.com/Linux-Core-Kernel-Commentary-Knowledge...

I keep telling myself I'm going to read it, but never get around to it. At this point, the John Lions book is probably just as relevant and probably much more educational.