The New York Times first reported the deal this morning, noting that Ms. Welch will be edited by Scribner's Samantha Martin.

Titled 10-10-10, the book will be Ms. Welch's second, though her first, 2005's bestselling Winning, was co-written with her husband. 

Washington lawyer Robert Barnett, who has recently brokered massive book deals for political heavyweights Karl Rove, Ted Kennedy, and Tony Blair, represented Ms. Welch in the deal. Mr. Barnett would not comment on the size of the advance Ms. Welch received--publishing insiders said it was rumored to be in the neighborhood of $1 million--but said there was already "strong foreign interest" from publishers abroad looking to acquire rights.

Ms. Welch, who writes columns for BusinessWeek and O, rose to prominence in 2002 after it was revealed that she and Mr. Welch—at that time married to someone else—were having an affair that began after she conducted an interview with him for an article in the Harvard Business Review.