I've browsed through this book.  Considering I've never written a line of ASP.NET code, I think this one is above my head right now.  I'll certainly pick it up once my feet are wet, provided we decided to use DNN.

Which would seem to be the same as "Beginning DotNetNuke 4.0 Website Creation in C# 2005 with Visual Web Developer", although using VB.NET instead of C#.  This looks like a good book for me, as the first half of the book covers ASP.NET development with VWD and it doesn't get into DNN development until about halfway.  Incidently, I got a copy of this from Amazon Marketplace for $5.78 ($2.29 + $3.49 S/H).

Keep in mind that the v.4 book was written pretty much before the version 4 DNN Framework was available.  Most of the screenshots and descriptions are out of date, and the module development is pretty much ripped from v.3 module development and not current practice.

I find most of the DNN books to be out of date, the framework develops too quickly.  But then the documentation is also out of date, and if it weren't for the project blogs and forums the correct information would be guesswork.  The books do give a decent beginning explanation, but none of them is very good or accurate at either module development or skinning, and even administration is marginal.  For example, the DNN 4 book by Wrox has an explanation of the new Member Role, but much of it is an extension of the DNN 3 version of the same book.

The best information is always online.  :)

Jeff