If you want a different approach, try Linux Device Drivers (LDD3, it's freely available), because during the course of the book it implements a small device dri

If you want a different approach, try Linux Device Drivers (LDD3, it's freely available), because during the course of the book it implements a small device driver, and so can you! This book is actually very old and some of the things may have changed, but still the fundamentals are the same and by learning how to implement a small driver you get to learn a lot about the OS.