David is an accomplished author. His work includes articles, short stories and volumes written on a broad spectrum of topics.

David has written volumes of materials some published and some yet to be. His first published work is called Boondocking in Bontoc wherein he discusses back-packing in the Mountain Province of the island of Luzon in the Philippines. He has published magazine articles, short stories, and several books. His subjects run from adventure stories to in-depth discussions of special problems.