By Sachar, Louis
By Bellos, Alex
By Singh, Simon
By Wong, C X
By Laura Laing
By Rubik, Erno
By Therapist, Puzzle
By Tent, M. B. W.
By Wapner, Leonard M.
By Barbara Bando Irvin
By Rapoport, Rebecca, Chung, Dean
By Velominati, The, Strack, Frank, Kennedy, Brett, Andrews, John 'Gianni', Millar, David
By Alex Bellos
By Rooney, Anne
By Steven Kotler
By Tim Dedopulos
By Regan, Lisa
By Sabbagh, Karl
By Lane, George
By Barrow, John D.
By Johnny Ball
By Chernyak, Yuri, Rose, Robert
By Gale, Harold
By Fiore, Albie, Mero, Laszlo, Rubik, Professor of Interior Design Erno