He authored over 25 books , including `` The Enlightenment : An Interpretation '' , a multi-volume award winner ; `` Weimar Culture : The Outsider as Insider '' ( 1968 ) , a bestseller ; and the widely translated '' '' ( 1988 ) .
He was the author of more than twenty-five books , including `` The Enlightenment : An Interpretation '' , a multi-volume award winner ; `` Weimar Culture : The Outsider as Insider '' ( 1968 ) , a bestseller ; and the widely translated '' '' ( 1988 ) .