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.