Jenny Sterlin
The third book in the Mary Russell-Sherlock Holmes series.
It is 1923. Mary Russell Holmes and her husband, the retired Sherlock Holmes, are enjoying the summer together on their Sussex estate when they are visited by an old friend, Miss Dorothy Ruskin, an archeologist just returned from Palestine. She leaves in their protection an ancient manuscript which seems to hint at the possibility that Mary Magdalene was an apostle—an artifact
6) O Jerusalem
The Twentieth-Anniversary Edition of the First Novel of the Acclaimed Mary Russell Series by Edgar Award–Winning Author Laurie R. King.
An Agatha Award Best Novel Nominee
In 1915, Sherlock Holmes is retired and quietly engaged in the study of honeybees in Sussex when a young woman literally stumbles onto him on the Sussex