Letters from the Dead — Steve Robinson

When genealogist Jefferson Tayte is hired to prove the identity of a black sheep in his client's family tree, he unwillingly finds himself drawn into a murder investigation with nothing more to go on than a 150-year-old letter and a connection to a legendary ruby that has been missing for generations.

As more letters are mysteriously left for him, Tayte becomes immersed in a centuries-old tale of greed, murder and forbidden love that takes his research from the wilds of the Scottish Highlands to the colour and heat of colonial India.

A dark secret is buried in Jaipur, steeped in treachery and scandal. But why is it having such deadly repercussions in the present? Can Tayte find the ruby and prevent the past from repeating itself before it's too late?

This is the seventh book in the Jefferson Tayte Genealogical Mystery series but it can be enjoyed as a stand-alone story.