Joshua T. Calvert is a USA Today-bestselling author whose books have sold more than two million copies worldwide and are available in English, German, Spanish, Italian, Swedish, Russian, and Ukrainian. A regular speaker at universities, book fairs, and symposia, Calvert is known for conducting immersive research to fuel his writing, resulting in such adventures as skydiving, scuba diving, firearms training, expeditions to Antarctica, and parabolic flights with astronauts. He lives with his family in New Zealand.