Sarah Palin Uses Private Jet Between Stops on Cross-Country Bus Tour to Promote Book

Dec. 1, 2009— -- It was billed as a bus tour, but Sarah Palin's travels across the country to promote her new book have included several flights on an expensive private jet, her publisher told ABC News.

The former Republican vice presidential candidate and Alaska governor, who sold off a private jet belonging to the state calling it "over the top," has been getting around the United States to promote her book aboard a Gulfstream 2 private jet -- at a cost of $4,000 per hour.

It's not unusual for politicians to regularly take planes on tours and then board a campaign bus to arrive at a stop, but in an era in which private jets carry a special sort of stigma, Palin may be vulnerable to criticism.

"Sarah Palin, I think, genuinely is a hockey mom, but every so often, she gets caught up in something a little more glamorous than that," said ABC News consultant Cokie Roberts.

During the presidential campaign, Palin was heavily criticized for the fancy designer clothes that she wore. The Republican Party had paid for the Palin's campaign.

HarperCollins, the publisher of Palin's best-selling "Going Rogue: An American Life," had no comment on the logistics for the book tour. But a company representative told "Good Morning America" that HarperCollins paid for the jet, and that Palin took it only for three legs of the journey and only when it was necessary.