By Ron Klinger
By Wladyslaw Izdebski, Dariusz Kardas, Wlodzimierz Krysztofczyk, Ron Klinger
By Jennifer Shahade
By Paul Mendelson
By Graham Burgess
By Gerald Abrahams
By Reuben, Stewart
By Telegraph Group Limited
By Igloo Books
By The Puzzle Society
By Asmodee Group, Jason Ward, Z-Man Games
By Graham Burgess, John Nunn, John Emms
By Michael Lewis
By Andrew Heron, Edmund James
By Zia Mahmood, Audrey Grant
By Robert Allen
By Victor Serebriakoff