By Igloo Books
By Fred Reinfeld
By Ian Brookes, Collins Books
By Miller, Judith H., Martin
By Karl Fulves
By James Wyatt, Bill Slavicsek, Richard Baker
By David Bird
By Linda Hannas
By John Scarne
By Sandy Balfour
By Maker, Brainstorm
By Lewis, Michael
By Paul Barnett
By Fulves, Karl
By James Plaskett
By The Puzzle Society
By Andrew Robson
By Philip Nelkon, Gyles Brandreth (Founder, National Scrabble Championships)
By James Cochrane
By Chronicle Books
By The Diagram Group
By Angela Fox Dunn
By Patrick Bossert
By Fever Media
By Sid Waddell
By Bristol, Olivia
By Dr Gareth Moore
By Collins Dictionaries, Deej Johnson
By The Editors of LIFE
By Editors of LIFE Magazine