Bas von Benda-Beckmann is a historian and currently works as a researcher at the Anne Frank House. He is also the author of De Velser Affaire (The Velser Affair), shortlisted for the Libris history award, and the equally acclaimed Het Oranjehotel (Hotel Orange). After the Annex was researched and written in collaboration with Erika Prins, Esther Göbel and Gertjan Broek.