By Gareth Moore
By Mason, Mark
By The guardian
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 Tibballs, Geoff
By Newby, Peter
By Langford, David
By Bailie, J.M.
By Moscovich, Ivan
By NO AUTHOR
By Deslandes, Clement, Guillaume
By Balfour, Sandy
By Parkinson, Judy
By Prefontaine, M