During the 1920s Herbert O. Yardley was chief of the first peacetime cryptanalytic organization in the United States, the ancestor of today's National Security

The history and work of the Cryptographic Bureau, officially known as section 8 of the U.S. War Dept. Military Intelligence Division (MI-8).

The first novel in a brand-new alternate history series where Teddy Roosevelt is president for a second time right before WWI breaks out, and on his side is the

The Last Gasp takes us to the dark side of human history in the first full chronicle of the gas chamber in the United States. In page-turning detail, award-winn

The second novel in an alternate history series where Teddy Roosevelt is president once more right before WWI breaks out, and on his side is the Black Chamber,