Seth Godin is the author of numerous books, including Unleashing the Ideavirus and the national bestseller, Permission Marketing. He is the founder of Yoyodyne, the first direct marketer on the Internet, which was acquired by Yahoo! in 1998. Godin served as vice president of direct marketing for Yahoo! until early 2000, when he left to devote time to writing and speaking. Godin also serves as a Flatiron Fellow, advising Flatiron Partners, a leading Internet-focused venture capital firm based in New York.