Gregory Mone is the author of several bestselling works of fiction and nonfiction for both children and adults. He is a contributing editor at Popular Science and an award-winning science writer. A graduate of Harvard College, he lives with his family on Martha's Vineyard.

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.

Grant Snider is an orthodontist by day and an artist by night. He is the author-illustrator of graphic novels and picture books, including What Color Is Night? His comics have been featured in many major publications, including the New York Times, and The New Yorker, as well as The Best American Comics 2013 anthology. He lives in Wichita, Kansas, with his wife and four children