So my book is doing well :)
Writing about web page http://www.amazon.com/gp/product/customer-reviews/159059584X/103-6827141-9792643
So the book I contributed to (I did the last two chapters on Spring Web Flow) seems to be doing well.
No idea about the number of sales (although I did receive my first commission cheque ;)), but all the reviews seem to like it.
Anyways, if you understand the title (Expert Spring MVC + Web Flow) then go and buy the book :) If you are really lucky and bring it to me in elab before the end of the week I might even sign it for you ;) :)