sentence: he has shot album covers for björk , elvis costello and the attractions , boy george , david bowie , kylie minogue , the style council , lady gaga , paul weller , gwen stefani , cheryl cole , seal , abc and massive attack , and has produced nicknight ( 1994 ) , a twelve year retrospective , and flora ( 1997 ) , a series of flower pictures , both published by schirmer mosel .