This book had a great concept, but the execution did not hold up as well. I've read a couple of other similar concepts that were written after this book, but executed much better. The plot never really seemed to go anywhere, and there was way too much discussion of the I Ching--it was distracting. There was also too many cutesy moments--"What if the US and Britain had actually won the war???"
I've read that the plot of the book was determined by the author consulting the I Ching -- it shows.