If you want to glean some insights into what’s hot right now and on top of people’s minds, it’s Office 365, Office 2013, Windows 8 (and app development for it), and SharePoint 2013. When you compare that list to the rest in the top 50, you see lots of interest in these topics, plus Windows Server, SQL Server, Microsoft Virtualization and Windows Phone, just to name a few. So, are you up to speed on these hot topics? If not, why not grab some FREE eBooks and get going?
Here is the link for a list of FREE PDFs (EPUB and MOBI formats as well) from Microsoft.
Hope this helps!