The Lost Ancestor (en Inglés) - Nathan Dylan Goodwin

When Morton Farrier, the formidable forensic genealogist, is called upon to uncover the mysterious disappearance of a housemaid working in a large Edwardian country house in 1911, he embarks on a perilous journey into the past. Uncovering surprising secrets and facing dangerous adversaries, Morton must use his comprehensive genealogical skills to solve the case. Will he be able to put the pieces together before it's too late?

This is the second book in the Morton Farrier genealogical crime mystery series although it can be enjoyed as a stand-alone story.