Stefan Klein studied physics and analytical philosophy, completing his doctorate in theoretical biophysics, before turning to writing to "inspire people with a reality that is more exciting than any thriller." He lives with his family in Berlin, where he is a visiting professor at Berlin University of the Arts.
Charles Constant is an actor whose professional storytelling career began at the age of thirteen, when he became an Actors' Equity Association apprentice. An accomplished audiobook narrator, Charles has recorded many popular titles, including How to Win at the Sport of Business by Mark Cuban. He lives in Los Angeles.