This is a good place to start, they maintain the kernel. They support Linus Torvalds so that he can work on it full time.
http://www.linuxfoundation.org

The site is huge and the best way to find what you are looking for is to use the search function. Example inodes.

These are all file system related structures. Narrow you search on the web to linux file system documents. Also, you can find useful stuff on:

www.kernel.org
www.tldp.org

Actually, one of the best books I have come across dealing with the Linux kernel is Robert Love's "Linux Kernel Development" which I do not know if it is the same Linux Kernel Development in your listing. Love presents the material in a very organized manner to which it becomes easier to follow.

I'm in the middle of reading Professional Linux Kernel Architecture by Wolfgang Mauerer. I have to admit it's a little daunting, but so far so good. It's pretty mucha step by step analysis of the actual kernel source and an explanation of what the code is doing and why. It's big, it's think, it's very technical, and probably not the best for satiating casual curiosity. But that said, I am getting a much better understanding of how things work, now, and feel more comfortable looking at the kernel source.

http://www.wrox.com/WileyCDA/WroxTitle/Professional-Linux-Kernel-Architecture.productCd-0470343435.html

I also have not ready any other books at all about the kernel specifically, so I have no point of comparison.