Robert Ludlum wrote 25 thriller novels, including The Bourne Identity, The Bourne Supremacy, and The Bourne Ultimatum, which were adapted into international blockbusters, as well as The Sigma Protocol. In addition, he created the Covert-One series. Ludlum was born in New York City and graduated with a B.A. He graduated from Wesleyan University and worked as a United States Marine, a theatrical performer, and a producer before becoming an author.