Welcome to the Microsoft SharePoint 2010 Developer Reference Web Site. Here you can find contents, information, and blog posts about Microsoft SharePoint 2010 as well as code samples and errata corrige for the book "Microsoft SharePoint 2010 Developer Reference" published by Microsoft Press.
In case you are interested in the book, you can buy it directly from O'Reilly Media.
If you are interested in downloading the code samples of the book, you can find them here.
Enjoy your SharePoint 2010 development experience!