text: ; (2001 September);  Magnum opus
  Pereras Magnum opus never loses sight of what is required to make a complete cricketer – in every sense of the word. Former England skipper Mike Brearley OBE has contributed the preface while the then Sri Lankas cricket coach, Davenall Whatmore, the foreword. It is the only self study training guide by an umpire for the players. It has won admiration and gained much recognition to the country from the cricketing world, which includes the ICC, MCC, ECB and even the prestigious Wisden Cricketers' Almanack (2002).
  ;Further Reading
  * [http://thinkingcricket2.tripod.com/THINKING%20CRICKET.htm Thinking Cricket (February 2004)] Retrieved on 12 March 2009
  * [http://www.island.lk/2001/11/11/sports05.html This is no ordinary cricket book but a well-thought out book of instructions. By Mahinda Wijesinghe (2001 November)] Retrieved on 12 March 2009