Arthur Conan Doyle and Oscar Wilde alongside a European Count, a medium with pophyria, Daniel Dunglas Home and several other members of the Society for Psychical Research attend a seance weekend at Thraxton Hall, which is apparently haunted and Lady Hope Thraxton has had a vision that she will die. Doyle wants to leave London to escape his readers who currently hate him because he killed off Holmes and takes the opportunity to escape London and his dying wife and embroil himself in a mystery. Then things take a twist with a murder, and it's not who everyone expects.
Wilde was the more interesting character but a little overblown. It wasn't a bad read but it felt like the story had to fit the characters used rather being a good plot in itself and might have been better if the author had made his own characters up.
Falls into Gothic, Country House Mystery, supernatural, ghosts, Haunted Houses, Amateur Sleuth and there's a locked room mystery also. I'm going to use Country House Mystery.