Scott Mitchell belongs to that rare breed of developers who can also explain things well as they can identify with the audience. Like scores of other web developers, I relied heavily on his tutorial site when I started my career with Classic ASP. He has consistently maintained the quality of articles & they are always educative. His "An Extensive Examination of" series of articles covering important .NET topics is excellent material for self-learners.
As I mentioned earlier, I find it is an interesting coincidence that besides sharing the same first name, Scott Mitchell, Scott Guthrie, Scott Hanselman & Scott Allen - all big names in the ASP.NET community, have an entertaining & simple style of writing.
I hope Scott Mitchell continues to write a lot more great books & articles.