Doubleday

Tuesday was considered "D-Day" by many in the book publishing industry—as in Dan Brown Day. The "Da Vinci Code" author's much-anticipated sequel, "The Lost Symbol," was released in both print and electronic versions. The book's publisher Doubleday, an imprint of Random House's Knopf Doubleday Publishing Group, had announced previously that the book would have a first printing of 5 million copies, the largest first print in Random House history.