David Hone is a palaeontologist based at QMW, University of London. The author of the acclaimed The Tyrannosaur Chronicles, hIs published work includes multiple scientific papers on spinosaur systematics and biology, and he was part of a team that named two new species in 2021. Mark Witton is a palaeontologist based at the University of Portsmouth. Widely recognised as one of the world's leading paleoartists, he has also published dozens of scientific papers as well as six books that feature his art.