John Kommerinus Tuinstra is a former Christian Reformed pastor, educator, and entrepreneur now affiliated with the Reformed Church in America. He is the author of the recently published memoir Dutch Preacher Boy: Coming of Age in Grand Rapids, Taking Wing Beyond, written under the pen name Tuna Fisch. He and his wife, Dr. Cheri Tuinstra, live in San Diego, Calif. His website is tunafisch.com.