Sealed Fate — A.G. Barnett

A locked room, an accidental death, a suspicious Sleuth. When Sam Wright is hired by the once stately home, and now tourist attraction, Bardwell Manor, he expected it to be a run-of-the-mill security check of the grounds. But when persuaded to take a tour with the rest of the sightseers by his detective-in-training Chanelle and old flame Lucy, he finds himself witness to a remarkable death. Suspicious that all is not as routine as everyone else seems to believe, Sam sets out to prove murder, and find the killer before the attraction closes and the killer has the chance to escape.