If you want an excellent book on kernel security, I'd suggest buying "A Guide to Kernel Exploitation: Hacking the Core". It's a fairly technical book, so I wouldn't recommend it unless you have exploit and modern operating systems experience, but it's a good book that covers every major platform and a lot of details.

It's probably one of the best technical security related books I've ever read.

Thanks much for info on this book

thank you so much for the info, I will take a look.

What was the title of the book you purchased? Can you share its name?

sure, this is the book: http://www.amazon.com/gp/product/1593271441/ref=oh_aui_detai...

Hacking: The Art of Exploitation, 2nd Edition

There's also:

  A Guide to Kernel Exploitation: Attacking the Core

http://www.amazon.com/Guide-Kernel-Exploitation-Attacking-Co...

...if you're interested in the kernel level exploits.

disclaimer: A co-worker of mine co-authored it.