Ups and downs. The Professional DotNetNuke 5: Open Source Web Application Framework for ASP.NET book which I co-authored has been out for almost a month now and ranks #10 in the Amazon hourly sales for ASP.
#10 in
Books > Computers & Internet > Web Development > Programming > ASP
Hopefully, Wrox will distribute it in more local book stores. I went to two bookstores and couldn't find the book.