Letter revealing Roald Dahl’s secrets to good storytelling to go under hammer

Roald Dahl’s dark tales have thrilled youngsters and adults for generations (PA)

A handwritten letter by children’s author Roald Dahl which reveals his secrets to good storytelling is set to go on sale at auction.

The letter, dated August 2 1989, showcases the writer’s opinion of his own work and his determination to get children reading.