From Alfred Hitchcock Wiki

Hitchcock historian Dan Auiler is the author of the following books on Hitchcock:

• "Hitchcock's Secret Notebooks" - by Dan Auiler
• "Vertigo: The Making of a Hitchcock Classic" - by Dan Auiler

Dan blogs about Hitchcock at All Things Hitchcock Blog.

Documentaries

He has appeared in the following Hitchcockian documentaries...

• Reputations: Alfred Hitchcock (1999)