Hi Patrick,
Part of the Wrox books have recently been bought by Wiley, who is the now the owner of the Wrox brand, the p2p site etc. Just 34 or 36 books were bought by them; the rest went to APress. (Not sure if they were all bought by APress, though). So, maybe APress bought the title you're looking after......
There is an "All Other Wrox Books" forum on p2p.wrox.com where you can post questions in relation to the books that haven't been bought by Wiley. Note there is no guarantee you'll get an answer there, as the authors of the book may not be on this list.
For any questions relating the title you mentioned, I suggest you check out
www.APress.com
Cheers,
Imar
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Imar Spaanjaars
Everyone is unique, except for me.