Hi Phil

I hold my hands up to the error, and certainly don't think BOL is the "gold standard", though it is very good. I mention Vieira's book as I think it's useful to have a general reference book to hand, especially when studying - BOL tends to be a little dry at times.

There is a 2008 version of the book out now too, but I haven't read it so can't comment.

Unfortunately I cannot correct the article once published, I have no access to it. I'd dearly love to add in the missing links I posted up for the 70-451 section too.

Thanks for everybody's feedback, I'll do my best to ensure no errors are made in future articles.