(en) Bob Dixon, « The Nice, the Naughty and the Nasty: The Tiny World of Enid Blyton », Children's Literature in Education, vol. 5, no 3, , p. 43–61 (DOI10.1007/BF01141765).
(en) Magnús Björgvin Gumundsson, The Censorship of Enid Blyton in Two of Her Novels : The Island of Adventure and Five on a Treasure Island, Université d'Islande, (lire en ligne).