Down the Dark River; The Nanny: pocket-book (set of 2 books)

London, 1878. A mysterious crime is committed on the Thames — the body of a young girl is found among rose petals in a boat drifting downstream. The deceased turns out to be the daughter of a famous judge, and... the investigation is taken over by senior inspector of Scotland Yard, Michael Corravan. A former boxer and dock worker from the shabby East End of London, Corravan has good street instincts and skill in finding clues, but he is very surprised when exactly one week later a second woman is found dead in a boat, and then a third...
It gradually becomes clear that the river murders may be linked to some terrible injustice from the past, for which someone has sworn to take cruel revenge. Corravan must get to the truth before London falls into a state of panic and before the killer demands another innocent victim.

Seven-year-old Joslyn loves her nanny more than anything in the world. When she disappears without a trace, Joe is inconsolable. How could she leave without even saying goodbye?
Thirty years later, despite her complicated relationship with her mother, Joe is forced to return to her childhood home. When human remains are accidentally found in the lake on the estate, Joe begins to doubt everything. What really happened when she was a child? What secrets did her nanny hide, and can she trust her mother?
An elegant and frightening thriller about secrets and deception. Gillian McMillan explores the darkest passions and calls of the human heart, and the devilishly clever "Nanny" tells us that sometimes it is better to hear a beautiful lie than to die from piercing truth.