"Water Like A Stone" by Deborah Crombie
Meanwhile, on her narrowboat, former social worker Annie Lebow is living a life of self-imposed isolation and preparing for a lonely Christmas, made more troubling by her meeting earlier in the day with the Wains, a traditional boating family whose case precipitated Annie's leaving her job.
As the police make their inquiries into the infant's death, Kincaid discovers that life in the lovely market town of his childhood is far from idyllic and that the dreaming reaches of the Shropshire Union Canal hold dark and deadly secrets . . . secrets that may threaten everything and everyone he holds most dear.