When does Charlie and the Great Glass Elevator return?

Charlie and the Great Glass Elevator is a children's book by British author Roald Dahl. It is the sequel to Charlie and The Chocolate Factory, continuing the story of young Charlie Bucket and chocolatier Willy Wonka. The book was published in the United States by Alfred A. Knopf, Inc. in 1972, and in the UK by George Allen & Unwin in 1973.