Dan is the bestselling author of Vertigo: The Making of a Hitchcock Classic (St. Martin's Press and Smashwords) and Hitchcock's Notebooks (HarperCollins). He has established himself as one of the l...view moreDan is the bestselling author of Vertigo: The Making of a Hitchcock Classic (St. Martin's Press and Smashwords) and Hitchcock's Notebooks (HarperCollins). He has established himself as one of the leading experts on Hitchcock and film history; his expertise has earned him appearances in several important documentaries. He appears often television and radio programs to discuss Hitchcock, film history and contemporary cinema.view less