Joop van Wijk-Voskui­jl is the third of Bep Voskuijl’s four chil­dren. He was born in 1949 in Ams­ter­dam. After a suc­cess­ful career as a video pro­duc­er (cre­at­ing cor­po­rate movies for major Dutch com­pa­nies) and mar­ket­ing man­ag­er (for news­pa­pers such as NRC Han­dels­blad and Alge­meen Dag­blad), Joop retired in 2010 to pur­sue research and writ­ing with the goal of telling his mother’s sto­ry. He also vol­un­teers as a guest lec­tur­er, teach­ing Dutch school­child­ren and oth­er groups about Anne Frank, the Holo­caust, and the resis­tance dur­ing World War II.