Quentin Saxby Blake CBE ( born December 16 1932 in Sidcup ) is a British cartoonist , illustrator and children 's book author , most known for his drawings in books written by Roald Dahl . Quentin Saxby Blake , CBE , FCSD , RDI , ( born 16 December 1932 ) is an English cartoonist , illustrator and children 's author , well known for his collaborations with writer Roald Dahl .