One of the things I like to track are book sales on Amazon.com, which provides a useful data point to monitor what developers are interested in on any given day. I use the www.TitleZ.com site (which is built using ASP.NET) to track specific titles I want to watch - it then generates a report showing real-time Amazon sales ranking data, as well as 7 day, 30 day and 90 day sales ranking averages.
This morning I pulled up my report and saw the usual books near the top of my list, and was about to navigate away when I noticed the eye-popping amazon ranking of the top book -"Professional ASP.NET 3.5: In C# and VB" by Bill Evjen, Scott Hanselman and Devin Rader. Its Amazon sales rank was a stunning #95 (of all books on Amazon), which meant it was outselling even Harry Potter (which is pretty much unheard of for any technology book).
It turns out that Amazon is holding a special price promotion for a short time on a few books - and this was one that was selected. Instead of the usual $54 price, you can buy it for a short time for a ridiculous $16.49. I'm not sure how long this promotion will last - but if you are looking for a great ASP.NET 3.5 book this might be something you might want to take advantage of:
The book is a great ASP.NET 3.5 book and an excellent end to end resource. It has been on the best seller list for programming books since it came out in March (usually in the top 5 of all programming titles), and has received glowing reviews (I posted a review of it on Amazon a few weeks ago and gave it 5 stars).
If you are in the market for a good ASP.NET book, you might want to consider taking Amazon up on this offer before it closes (and apologies in advance if the price changes before you read this).
Hope this helps,
P.S. If you are looking for other good .NET 3.5 and VS 2008 books - I also recommend: C# 3.0 In a Nutshell, LINQ in Action, and Pro LINQ: Language Integrated Query in C# 2008 (all of which average a 5 star rating on Amazon).