Over 150 writers, including from some from abroad, will attend the Mathrubhumi International Festival of Letters - one of the largest and most polyphonic cultural events in Kerala- in Thiruvananthapuram next month. It would bring together over 150 national and international writers with sessions devoted to divergent topics, trends, ideas and genres ranging from fiction, poetry, non-fiction, politics, environment, travel and cinema prominently, the organisers said in a release here today. Some of the writers coming for the festival include Oksana Zabuzho , Shashi Tharoor, William Dalrymple, Bigao Chuol, Deepak Unnikrishnan, Felicia Yap, Kurkov, Mohammed Hanif, Andrei Kurkov, Balachandran Chullikad and Raghu Rai.