Sivasailam "Thiagi" Thiagarajan, Ph.D., is Resident Mad Scientist at the Thiagi Group, a Bloomington, Indiana–based organization with the mission of helping people improve their performance effectively and enjoyably. Thiagarajan has published forty books, one hundred and twenty games and simulations, and more than two hundred articles. He has made hundreds of presentations and keynote speeches at professional conferences. An international consultant, he has lived in three different countries and has consulted in twenty-five others.