The Murder at World’s End by Ross Montgomery
The Murder at World's End is a fun locked-room mystery. The characters are quirky and the setting is unique. It's 1910, Halley's Comet is about to pass overhead, and we're at Tithe Hall on an island off the Cornish coast, Word's End. Lord Stockingham-Welt believes the comet will bring dangerous gasses with it and has decided to seal his staff and his family members into the mansion over night, complete with air tanks and gas masks. Stephen Pike arrives, ex-convict turned manservant, arrives in the midst of the chaos and is hired, despite his original offer of employment not being legitimate. While the comet obviously doesn't cause environmental disasters, Lord Stockingham-Welt is killed that night, in his locked study.
The family members are rather unlikable and the staff are acting suspicious. Our sleuths are Stephen, who has been targeted as the main suspect, and the elderly Lady Decima, a difficult,, frustrated scientist who is also Stephen's only alibi. Lady...