Some of his notable works include James and the Giant Peach, Charlie and the Chocolate Factory, George's Marvellous Medicine, Fantastic Mr Fox, Matilda, The Witches, and The Big Friendly Giant. His short stories are known for their unexpected endings, and his children's books for their unsentimental, often very dark humour. In 2008 The Times placed Dahl sixteenth on their list of "The 50 greatest British writers since 1945". He has been referred to as "one of the greatest storytellers for children of the 20th century". A young orphan named Luke is staying with his grandmother in a large British hotel. Jim Henson himself received an executive producer credit. The film adaptation was produced by Jim Henson Productions, with effects by the Creature Shop. Dahl rose to prominence in the 1940s with works for both children and adults, and became one of the world's best-selling authors. The Witches is a 1990 film based on a book by Roald Dahl.