<p>After a successful career in mathematics and computer science, receiving grants from the National Science Foundation and NASA, and being listed in <em>Who’s Who in Computer Science</em> and <em>Two Thousand Notable Americans</em>, James R. Callan turned to his first love—writing.  He has had four non-fiction books published.  He now concentrates on his favorite genre, mystery/suspense/thriller. His fourteenth book releases in February, 2021. In addition, he speaks at conferences and gives workshops on various writing topics such as character development, dialog, audiobooks, plotting, and the mystery/suspense/thriller genre.</p><p>He and his wife split their time between homes in northeast Texas and Puerto Vallarta, Mexico. They have four grown children and six grandchildren.</p>
