Shock Value: How a Few Eccentric Outsiders Gave Us Nightmares, Conquered Hollywood, and Invented Modern Horror is a 2011 American book by Jason Zinoman.

It traces the evolution of horror films as they began to focus on more reality-based, less campy subjects during the late 1960s and early 1970s.

Zinoman also researched stories he heard repeated from multiple sources, such as the former friendship between John Carpenter and Dan O'Bannon, both of whom were responsible for important horror films in the 1970s.

[5] Ty Burr of The New York Times praised the book's research but wrote it "struggles to bring the larger picture into focus".

[8] Ryan Daley of Bloody Disgusting rated it 5/5 stars and described it as "the most effortlessly enchanting treatise on the American horror film since Stephen King's Danse Macabre".