Study Room, Malacañan Palace December 6, 2016 President Rodrigo Roa Duterte spoke with Mr. Ioan Grillo, author of the book ‘Gangster Warlords,’ during the latter’s courtesy call at Malacañan Palace. In his speeches, the President has urged his audience to read ‘Gangster Warlords’ to help them understand the drug menace facing the Philippines. Mr. Grillo continue reading : Courtesy Call of Mr. Ioan Grillo, Author of the ‘Gangster Warlords’ Book