Yup, they're selling like hotcakes...to himself:

Federal Election Commission records show that the former Godfather's Pizza executive paid more than $64,000 of his presidential campaign funds to his motivational speaking company, T.H.E. New Voice Inc., for copies of his own books, and for lodging, airfare, and resources, Bloomberg News reports. Cain's third-quarter filing reported his campaign as having spent $4 million through Sept. 30.

Previous rulings by the FEC have allowed candidates to use their campaign funds to buy their own books, as long as the purchase is at market value and the money goes to charity rather than to personal profit. But Bill Allison, editorial director at the Washington, D.C.-based Sunlight Foundation, told Bloomberg that Cain's case should raise some eyebrows.

"All candidates publish books and they offer them as a premiums to donors, but most candidates aren't buying them from their own companies," Allison said. "It raises the question of his campaign contributions ending up in his own pocket."