Book trade fact of the day

According to his publisher, Dan “Da Vinci Code” Brown’s latest book, The Lost Symbol,
sold more copies in its first 36 hours than any other adult hardback
sold in total. (A certain boy wizard is excluded by the artful
qualifier, “adult”.)

That is for the UK I believe (the U.S. book market is in fact less intelligent), where some copies of the book have been selling for less than five pounds.