State of Fear

State of Fear is a 2004 techno-thriller novel by Michael Crichton, his fourteenth under his own name and twenty-fourth overall, in which eco-terrorists plot mass murder to publicize the danger of global warming. Despite being a work of fiction, the book contains many graphs and footnotes, two appendices, and a 20-page bibliography in support of Crichton's beliefs about global warming. Climate scientists, science journalists, environmental groups, and science advocacy organizations have disputed the views presented in the book.

The novel had an initial print run of 1.5 million copies and reached the #1 bestseller position at Amazon and #2 on The New York Times Best Seller list for one week in January 2005. The novel garnered mixed reviews, with some reviewers stating that the book's controversial stance on the global warming debate distract from the story. The book is thought to have popularised the Antarctica cooling controversy.