"He was a visionary publisher and a champion for photographers." — Cristina Mittermeier

"Hendrik leaves a gaping hole where once stood a giant of the publishing world. He dreamt big - drawing from a US experience to which he brought his European sophistication. This made for a relentless ambition for uncompromising quality. The world has lost a sensible man." — Sebastian Copeland

"Of all publishers I have worked with he is the only one who allowed us to dream big and executive." — Paul Nicklen

"One of the all-time greats who gave so many people so many opportunities to thrive in the creative world." — David Drebin