Bunn grew up in North Carolina. He became an international financial expert and worked in Europe, Africa and the Middle East. Bunn and his wife live in Oxford now. He is Novelist in residence at the Regent's Park College of Oxford University.
Bunn is writer of historical fiction and legal thrillers, in which Christian faith plays a big part. He wrote some novels together with Canadian author Janette Oke, and some other with his wife Isabella. Bunn has recently begun publishing using the name Davis Bunn. Bunn has also used the pseudonym Thomas Locke. He won a Christy Award three times. His books are published by Bethany House and worldwide by several local publishers.