He is the author of Cybersecurity Law, a textbook published by Wiley in 2017, and The Twenty-Six Words That Created the Internet, a history of Section 230 of the Communications Decency Act forthcoming from Cornell University Press. He clerked for Judge Milan D. Smith, Jr. of the U.S. Court of Appeals for the Ninth Circuit and for Judge Leonie M. Brinkema of the U.S. District Court for the Eastern District of Virginia. Kosseff is a graduate of Georgetown University Law Center and the University of Michigan. Before becoming a lawyer, he was a journalist for The Oregonian and was a finalist for the Pulitzer Prize for national reporting.