[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/08/13/art.mc.cnn.jpg caption="A book based on Edwards' mistress is soaring in book sales."](CNN) - Author Jay McInerney may have John Edwards to thank for a likely influx of book royalties.
His twenty-year old novel, based on the life of Edwards' mistress when she was a young adult, is soaring in sales rankings - so much so that the book's publisher has commissioned an additional 2,500 copies for print on Monday.
McInerney has said the book's main character, described as an "ostensibly jaded, cocaine-addled, sexually voracious 20-year old," was inspired by Rielle Hunter - the film producer who Edwards recently acknowledged having an affair with in 2006.
The book, about the New York singles scene amidst the excess of the 1980s, is now 299 on Amazon.com and 393 on Barnes&Noble.com - moves of a couple hundred places in only a handful of days. Before news of the affair broke, the book was thousands of spots lower.
Edwards, the former presidential candidate and 2004 vice presidential candidate, said he had a brief affair with Rielle Hunter in 2006 when she was employed by his political action committee to make "webisodes" about his campaign.
Despite breathing new life into one of his novels, McInerney said earlier this week he is no fan of the former North Carolina senator.
"To say that he slept with her but he wasn't in love with her - that's not very chivalrous," the author told the New York Daily News. "He's trying to distance himself from her."
"I don't feel my questions have been answered with regard to Edwards," he also said. "It was a half-assed confession."