“When President-elect Barack Obama appeared on ’60 Minutes’ on CBS on Sunday in his first interview since winning the election, he mentioned having read ‘a new book out about F .D. R.’s first 100 days’ without specifically naming a title or author. … The publishers and authors of at least three such books that could fit Mr. Obama’s description each spent much of Monday wondering whether they had just gotten a plug from the soon-to-be leader of the free world.”