If the exercise answers exist somewhere, Apress support would be who you'd need to contact to find them. It's possible that some other reader will know where these are, but as this isn't a Wrox book that's owned by Wiley (it's owned now by APress) we've never had the exercise answers for us and wouldn't know where they are. Sorry we can't be of more help.

Jim Minatel
Senior Acquisitions Editor
Wiley Technology Publishing
WROX Press