Roger published “SPYWRITER: Richard Krebs' Astonishing Journey from German Communist Conspirator to American Combat Veteran” in early 2021. It is a biography of the German communist spy, Richard Krebs, alias Jan Valtin, who saw the light, abandoned his position in the Comintern, came to America as an illegal alien, wrote the best selling non-fiction book of 1941 “Out of the Night,” was awarded a Bronze Star in the battle for the Philippines, earned his American citizenship, and collaborated with elements of America’s Cold War intelligence apparatus. Roger’s first literary work was “Stealing the Atom Bomb: How Denial and Deception Armed Israel,” published in 2016. Response to the book from nuclear cognoscenti and the general public has been good, as shown in the reviews found here and on Goodreads.com. Readers can learn a bit more about the Israeli bomb and the Apollo/NUMEC affair by going to the website of the National Security Archive where the most important source documents for this book are posted. Mattson was born in Nebraska a month before the attack on Pearl Harbor. In the year of Sputnik 1, inspired by a math teacher, he opted for a career in engineering and earned a Ph.D. in Mechanical Engineering from the University of Michigan. He has worked in the nuclear safety field for more than 50 years.