Task: Explanation
Input (English): The Secret is a 2016 Northern Irish ITV mini-series based on "Let This Be Our Secret", Belfast journalist Deric Henderson's account of the double murder of Lesley Howell and Constable Trevor Buchanan, whose bodies were discovered in a fume-filled car in the garage of a property in Castlerock, County Londonderry, in Northern Ireland in May 1991. Question: What is the book that was based on the crimes Colin Howell is convicted of ? Answer: Let This Be Our Secret
Output (English): The Secret is a 2016 Northern Irish ITV miniseries based on Let This Be Our Secret, Belfast journalist Deric Hendersons account of the double murder of Lesley Howell and Constable Trevor Buchanan, whose bodies were discovered in a fumefilled car in the garage of a property in Castlerock, County Londonderry, in Northern Ireland in May 1991.