The book “Jokes Only: A Book on Duterteisms” was written and self-published by Dr. Crispin C. Maslog, a former journalist of the Agence France-Presse and journalism professor of Silliman University in Dumaguete City and the University of the Philippines – Los Baos. The book contains 64 jokes that President Duterte uttered during his campaign for the presidency in 2016 and in the next five years during his press conferences and public engagements.