All off topic discussions go here. Everything from the funny thing your cat did to your favorite tv shows. Non-programming computer questions are ok too.
I recently bought a book called Developing Your own 32-Bit Operating System.
It was later released by the author for free here http://www.ipdatacorp.com/mmurtl/
So far, Its really good and I would recommend it to other people working on writing an operating system.
Other books I am reading that are useful for those doing OS Development are:
Operating Systems: Design and Implementation 2nd Edition
Design and Implementation of the 4.4 BSD Operating System