Wilhelmus Henricus Maria van den Hout ('s-Hertogenbosch, 3 June 1915 – The Hague, 24 February 1985) was a Dutch writer and publicist, best known as the writer (under the pseudonym Willy van der Heide) of the Bob Evers series of children's books. Van den Hout lost his credentials as a journalist after World War II for having collaborated with the Nazi propaganda machine, but gained commercial success with the Bob Evers series. He also used the pseudonyms Willy Waterman, Willem W. Waterman, Sylvia Sillevis, Victor Valstar, Victor H. Huitink, Joke Raviera, Zsa Zsa Ferguson and C.B. McInverness, M.D., Ph.D., and translated English literature into Dutch. Source: Wikipedia (en)