After a successful career in mathematics and computer science, receiving grants from the National Science Foundation and NASA, and being listed in Who's Who in Computer Science and Two Thousand Notable Americans, James R. Callan turned to his first love-writing. He wrote a monthly column for a national magazine for two years. He has had four non-fiction books published. He now concentrates on his favorite genre, mystery/suspense, with his twelfth book releasing in 2018.
