William Queen is the author of the New York Times bestseller Under and Alone and Armed and Dangerous. He spent twenty years as a special agent with the U.S. Department of the Treasury, Bureau of Alcohol, Tobacco and Firearms. A Vietnam veteran, Queen devoted his career to law enforcement, serving first as a local police officer and then as a U.S. Border Patrol agent before joining ATF. He is among the country's foremost experts on the violent world of outlaw motorcycle gangs and has lectured widely to law-enforcement organizations in multiple countries. For his ground-breaking undercover work playing the part of biker "Billy St. John," William Queen was awarded the 2001 Federal Bar Association's Medal of Valor.
Douglas Century is the author of Barney Ross and Street Kingdom, the co-author of the New York Times bestsellers Under and Alone and Takedown, and a contributing writer for The New York Times. His nonfiction work has appeared in such publications as Details, Rolling Stone, Men's Journal, New York, Vibe, Radar, Blender, Newsday, and The Guardian. Century is a cum laude graduate of Princeton University. He lives in New York City.