The book that you are asking about, dotnet enterprise development in c# from design to deployment, was not purchased by Wiley and so it is not on the current www.wrox.com
site. After Wiley made it's purchase of Wrox assets from their liquidator, it is my understanding that Apress purchased the remaining books. You may want to try their site to see if they have it now. If not, then no publishing company purchased the book and its rights are still with the liquidator. However, a bookstore (either online or not) may still be selling their remaining inventory.
Hope that this is helpful,
Wiley Publishing/Wrox Press