Lest Darkness Come Upon You — Tim Ellis

Sir Arthur Quinton is murdered in his own bedroom during a garden party at Darcy Court and Parish and Richards must use all their skill to find the culprit and bring them to justice. As usual though, the investigation twists and turns to an unnerving conclusion. Xena and Stick are told to co-operate with the Lead Investigator of the Aircraft Accident Investigation Board (AAIB) when it's discovered that a light plane has been sabotaged at Hunsdon Flight School, but Xena has never been one for co-operating, even though there's a memorandum on the subject. As they struggle to identify a suspect, the investigation takes a strange twist towards a thirty year-old unsolved case that DCI Mira D'Aramitz failed to solve.