NEW YORK -- "Going Rogue" is going big.

Publisher HarperCollins said Friday that Sarah Palin's memoir sold 300,000 copies its first day, among the best openings ever for a nonfiction book. In 2004, Bill Clinton's "My Life" debuted with sales of 400,000 copies. The year before, Hillary Rodham Clinton's "Living History" started at 200,000.

"Going Rogue" was released this week and its print run already has been increased from 1.5 million copies to 2.5 million, HarperCollins announced Friday. Palin, the former Alaska governor and GOP vice presidential candidate, is in the midst of a nationwide promotional tour.