C P Mathan : Kadhayum Kalavum is the biography of P G Thomas. This biography is not just the life story of P G Thomas, but also the story of a bygone era. This book also establishes the indispensable link between P G Thomas and the history of Travancore. Through his life, one gets to read the details of 20th century history of Travancore such as freedom struggle and the “Responsible Government” agitation.