For what it's worth, Knopf is declaring victory, according to this press release, which I just received via e-mail:

BILL CLINTON’S MY LIFE SETS ONE-DAY, NON-FICTION SALES RECORD

BOOK SELLS OVER 400,000 COPIES IN AMERICAN DEBUT

PRE-PUBLICATION DEMAND FOR BOOK BRINGS TOTAL IN-PRINT FIGURE TO 2.25 MILLION

NEW YORK, 23-June-04 – First day sales for Bill Clinton’s MY LIFE exceeded 400,000 copies in the U.S., it was announced today by Sonny Mehta, president of the Knopf Publishing Group. “This is a record-breaking number for a work of non-fiction,” says Mehta. “Indeed, we are seeing exceedingly strong sales for MY LIFE not only across the country but around the world.”

In light of the unprecedented demand from retailers, Knopf printed an additional 725,000 pre-publication copies of the book beyond the initial print run of 1.5 million, bringing the total number of copies in print for MY LIFE up to 2.25 million copies.

The Random House Audiobook of MY LIFE had a record-breaking laydown for an adult book with over 315,000 copies. Monday’s sales broke first-day sales records, as well, with over 35,000 copies sold yesterday, nearly ten times the typical audio bestseller....

Because of continuing sales and demand from retailers, Knopf is planning additional printings of the book.

MY LIFE is already a worldwide bestseller, ranking number-one on Amazon in the United States, England, France and Japan....