William Dietrich is the author of fourteen novels, including six previous Ethan Gage titles—Napoleon's Pyramids, The Rosetta Key, The Dakota Cipher, The Barbary Pirates, The Emerald Storm, and The Barbed Crown. Dietrich is also a Pulitzer Prize-winning journalist, historian, and naturalist. A winner of the PNBA Award for Nonfiction, he lives in Washington State.