Billy's biggest wish is to turn a weird old wooden house into a wonderful sweet-shop. But then he finds a giraffe, a pelly and a monkey living inside - they're the Ladderless Window-Cleaning Company! Who needs ladders when you've got a giraffe?

Roald Dahl, the best-loved of children's writers, was born in Wales of Norwegian parents. After school in England he went to work for Shell in Africa. He began to write after "a monumental bash on the head", sustained as an RAF pilot in World War II.

Roald Dahl died in 1990. Quentin Blake is one of the best-known and best-loved children's illustrators and it's impossible now to think of Roald Dahl's writings without imagining Quentin Blake's illustrations.