Berkley Publishing Group, ISBN 9780451476173, January 2018
Veronica Speedwell and Revelstoke Templeton-Vane--Stoker--are working away at their respective restoration and cataloging duties in the Belvedere, the future museum on the grounds of the home of the Earl of Rosemorran. It's the Earl's family collection of animals, insects, devices, and other oddities that they are cataloging.
Then an expedition to Egypt returns, with treasures, a story of a curse killing members of the expedition, and the expedition photographer, John de Morgan, missing, along with a valuable diadem found in the tomb the Tivington expedition excavated on this trip.
De Morgan was once Stoker's best friend. He's now married to Stoker's former wife, Caroline, who left Stoker apparently dying in the Amazon. Caroline returned to Britain and divorced him, claiming cruelty, and in the process destroying his reputation.
De Morgan may be a thief, who has stolen the diadem to finance an escape from his tempestuous marriage. Or he may be dead, killed by the real thief. If de Morgan is dead, Stoker is the most likely suspect in his murder.