John Barrie, the creator of a leading plagiarism-recognition system, claimed he found at least three instances of what he calls "textbook plagiarism" in the leggy blond pundit's "Godless: the Church of Liberalism" after he ran the book's text through the company's digital iThenticate program.

He also says he discovered verbatim lifts in Coulter's weekly column, which is syndicated to more than 100 newspapers, including the Fort...