What date did the Beatles perform their Rooftop Concert at the Apple Building ?
" The Longest Cocktail Party : An Insider 's Diary of the Beatles , Their Million - dollar Apple Empire and Its Wild Rise and Fall " ( ISBN 1-84195-602-3 ) is a rock history book by Richard DiLello , published in 1973 by Playboy Press , and reprinted in 1981 and 2005 .