By Matthew Santoro, Santoro, Matthew
By The Times Mind Games, .
By Somerville, Neil
By Bellos, Alex
By Wyse, Elizabeth, Anon
By Bradford, Anne R., Collins Puzzles
By Schott, Ben
By Arcturus Publishing
By Kampelmann
By Barry R. Clarke, illustrated by Rob Collinet
By Tulloch, Alexander
By You, Have I Got News For
By Smullyan, Raymond M.
By Moore, Dr Gareth
By Vaughan, Johnny, Outen, Denise van
By The guardian
By NO AUTHOR
By Deslandes, Clement, Guillaume
By Moscovich, Ivan
By Parkinson, Judy
By Prefontaine, M
By Bailie, J.M.
By Langford, David
By Newby, Peter
By Tibballs, Geoff
By Manley, Don
By Mason, Mark