By J. Smartt
By Sara Lewis
By McCosker, Kim, Bermingham, Rachael, Kim McCosker, Rachael Bermingham
By Wilson, Carol
By Alastair Williams
By Kev Reynolds
By Costantino, Maria
By Vesna Maric, et al.
By Ardagh, John
By William A Powell
By Andrew Evans
By Lucy Mallows
By Piers Letcher, Sarah Parkes
By Neil Taylor, etc., et al
By Gerald Jenkins, Magoalen Bear
By Chinery, Michael
By Ian Buxton
By Ian Stewart (, Professor of Mathematics, University of Warwick)
By Deary, Terry, Brown, Martin
By Mojang AB
By Terry Deary, Martin Brown
By Various Experts
By Maw Broon
By Norma Miller
By Tana Ramsay
By BBC
By Edward Knobel
By Carter, Philip, Russell, Ken