Susan Cain is a writer who specializes in psychological non-fiction. She has a blog on psychology today.com, and her New York Times article on the evolutionary benefits of shyness was the most emailed article in the paper when published.

She previously worked in corporate law for seven years, representing clients such as J. P. Morgan and General Electric, and then became a negotiations consultant with clients including Merrill Lynch and Shearman & Sterling. Susan Cain graduated with honors from Princeton University and Harvard Law School. She lives on the Hudson River, New York, with her husband and two sons.