CALEB CARR is the critically acclaimed, bestselling author of The Alienist series, The Lessons of Terror, Killing Time, and The Devil Soldier. His books have been translated into over twenty languages worldwide. He is also a contributing editor to MHQ: The Quarterly Journal of Military History, and the other series editor of the Modern Library War Series. He was educated at Kenyon College and New York University, and currently lives in upstate New York, where he teaches military and diplomatic studies at Bard College.
JON LELLENBERG, author of the afterword, is the U.S. agent for the Conan Doyle Estate, co-editor of a number of anthologies of new Sherlock Holmes stories written by mystery writers, and the historian of The Baker Street Irregulars.