This novel is a mix of ghost story, mystery, with a touch of espionage and even a little romance. It is 1917 and WWI has been going on for three, long years. Almost every family in Britain has been touched by loss and this includes Kate Cartwright, whose brother was recently killed. Kate is working as a code-breaker, when she is asked by Captain Sir Mansfield Smith-Cumming (known as ‘C’ and Head of the Secret Intelligence Service) to take up the offer of a visit to Black Water Abbey, home of Lord and Lady Highmount, on Black Water Island; a remote island off the coast of Devon. She had, initially, refused the suggestion, even though her parents were visiting, as she was once engaged to Reginald Highmount, recently also killed in the war, along with his brother. The invitation had also included her fiancé, Rolleston Miller-White, but this relationship has also broken down.
As well as the awkward discomfort about her personal relationships, Kate is unwilling to attend the winter solstice at Black Water Abbey, knowing that the purpose for the visit includes two guests involved with spiritualism. Although Kate can, herself, see spirits, she has no sympathy with séances. However, when told that some Top Secret Plans have recently been taken from Lord Highmount, an arms manufacturer, and ended up in German hands, she knows she has no choice. Accompanying her, and Rolleston to the island, is Captain Donovan, masquerading as Miller-White’s ‘man,’ but really there as all of the guests now at the island were also present when the plans were stolen. Donovan and Kate need to join forces to keep Lord Highmount safe and protect sensitive documents.
All of the guests seem to have a motive for wishing Lord Highmount ill; many of which involve his production of weapons and the carnage wreaked by the war. The storm tossed island, with its assorted cast of possible suspects give a good sense of atmosphere. This is, in places, a little busy in terms of plot. There are secret passages, bad weather, an island cut off from outside help and more than a touch of mystery at every turn and that is not mentioning the stream of spirits that seem to surround Kate. I liked Kate and Donovan, though, and hope they return in further adventures, as I feel they have more to offer. I received a copy of this book from the publisher, via NetGalley, for review.