Maybe it's the prose, or the charisma, or the novelty. But if voter excitement were measured by book sales, then Sen. Barack Obama would be the clear front-runner.
Sales have exploded in 2008 for the works of Obama, the Illinois Democrat who has steadily climbed in the polls all year. Sales have stayed flat for the works of Sen. John McCain, the Arizona Republican who quickly and surprisingly became his party's presumptive nominee after he seemed finished last summer.
"There's no question that Obama is a phenomenon but to many people he's still a discovery and they may be coming to his book to get to know who he is," said Jonathan Karp, head of the Twelve imprint at Hachette Book Group USA, which just released McCain's "Hard Call" in paperback.