Washington (CNN) - Add "best-selling author" to Mitt Romney's long and diverse resume.
The former Massachusetts governor's new book, "No Apology: The Case for American Greatness," is set to debut in the top spot on the New York Times bestseller list due out March 21, a source confirmed to CNN.
Romney, a likely frontrunner for the 2012 Republican presidential nomination, is in the midst of a nationwide book tour that will feature stops in Iowa, New Hampshire and South Carolina in the coming weeks.
He has been greeted by long lines at his book signings; the Detroit News reported that Romney packed 450 people into a Border's bookstore in the Detroit suburb of Birmingham on Wednesday.
Romney will be signing books in Grand Rapids, Michigan on Thursday before flying to California for a Friday stop in Sacramento.