Understanding the Linux Kernel book?

[Joe Ryan <jryanitpro@xxxxxxxxxxx>]

Hello guys

I am very interested in learning all I can about the kernel architecture etc. Eventually I plan to start helping with small programming tasks etc. Would anyone know if there is substantial changes not reflected in the book. In other words is there numerous subsystems that have been rebuilt or replaced. Does the system still bootstrap the kernel the same (same functions etc)

Thanks

Joe Ryan