Bart King has written more than twenty-eight books, including The Big Book of Boy Stuff, The Big Book of Spy Stuff, and The Pocket Guide to Mischief. His books for Gibbs Smith have sold more than 830,000 copies combined. He is also a 2019 winner of the Bulwer Lytton Writing Contest's "Vile Pun" award. He lives in Silverton, Oregon. Giacomo Calabria is an award-winning educator, a scholar with Humanities New York, and an author whose works include one play, two novels, various book chapters, and more than 200 published articles. His writing has been featured on BBC America, Business Insider, CNN Money, Folger Magazine, The Huffington Post, Politico Magazine, Reader's Digest, Slate, WAMC's The Roundtable, and Princeton University's Electronic Bulletin of the Dante Society of America, among others. He lives in Albany, New York.