The 2nd revision of the book is quite good. Brian expanded on many things but stopped short of the Amiga years and the last days of Commodore.
There are more pictures and more people interview in the 2nd revision.
Given the nice changes in the 2nd revision, I am really looking forward to the 3rd installment which should really give some great information about the Amiga years at Commodore as well as the final days.
Cheers!
-P