Bob Evers is a Dutch novel series of boys' books, named for the main character, written by Dutch author and Nazi collaborator Willem van den Hout, under the pseudonym Willy van der Heide. The series was started in 1949; 32 volumes were published until 1963. Van den Hout published two additional volumes in 1977, and the series was extended by Peter de Zwaan, who published volume 50 in 2010. An estimated five million Bob Evers books were sold. Source: Wikipedia (en)