Unknown book author


#1

Have found this book on the internet. It gives very good English language summary of the history of Jainism, particularly in relation to the shalaka purush. Does anyone know who has authored this book?

https://www.google.com/url?sa=t&source=web&rct=j&url=http://arnavk.me.ht/wp-content/uploads/2016/08/Jain-History.pdf&ved=2ahUKEwj35v_u-6LfAhWgUBUIHYXcC5sQFjAeegQIBRAB&usg=AOvVaw3z-zHpmNQXX4bt9hCKZyUL