Simplify the following text for a Grade 11 native English-speaking person.
Original: Ian Russell McEwan CBE , FRSA , FRSL ( born 21 June 1948 ) , is an English novelist ( sometimes nicknamed `` Ian Macabre '' because of the nature of his early work ) .
Simplified: Ian Russell McEwan CBE , FRSA , FRSL ( born 21 June 1948 ) is an English novelist and screenwriter , and one of Britain 's most highly regarded writers .