By Chambers
By Collins Kids
By J.M. Bailie
By Anne R. Bradford
By Igloo Books
By Collins
By G. T. Karber
By Anne Stibbs
By Don Manley
By Arcturus Publishing Limited
By Bookoli Ltd.
By Eric Saunders
By The New York Times
By Hayden Fox
By John Grant
By Alan Connor
By Telegraph Group Limited
By The Times Mind Games, David Parfitt
By J.C.P. Schwarz
By R.J. Edwards
By The Times Mind Games
By Collins Dictionaries, Collins Puzzles
By Ivy Press