The following list are books in specific areas of interest that I'd recommend. I've either own or have read these and think very highly of them. For buying books, I strongly recommend using Amazon.com
- Windows SharePoint Services v3 & Office SharePoint Server 2007
- SQL Server 2005 (including SSIS, SSAS, SSRS)
- General Development
- .NET
- Content Management Server 2002
- Windows SharePoint Services v2 & SharePoint Portal Server 2003
Windows SharePoint Services v3 & Office SharePoint Server 2007
SQL Server 2005
General Development
.NET
Microsoft Content Management Server 2002