Books like Blood on the water by Anne Perry - undifferentiated

A 2012 crime thriller that explores a marriage in turmoil as one wife disappears, leaving her husband to confront suspicion and secrets.

Arthur Conan Doyle’s classic detective tale follows Sherlock Holmes and Dr. Watson as they investigate the legend of an undead hound on Dartmoor, revealing secrets that threaten a family’s legacy.

On a luxury Nile cruise, the glamorous Linnet Ridgeway is found murdered, and intrepid detective Hercule Poirot must uncover the truth amid intrigue, secrets, and false leads.

Walter Hartright, a drawing master, becomes entangled with Laura Fairlie, Sir Percival Glyde, and the scheming Count Fosco as questions of identity and madness intertwine in 19th‑century England.

A psychiatric ward mystery twists into a conspiracy over a Soviet mind‑transfer procedure, as a patient claims to be former scholar Dr. Nicholas Slopen, sparking questions of identity and authenticity.

"In England in the late 1920s, The Honourable Daisy Dalrymple Fletcher, on a convalescent trip to the countryside, goes to visit three old school friends in the area. The three, all unmarried, have recently bought a house together. They are a part of the generation of "superfluous women"--brought up expecting marriage and a family, but left without any prospects after more than 700,000 British men were killed in the Great War. Daisy and her husband Alec--Detective Chief Inspector Alec Fletcher, of Scotland Yard --go for a Sunday lunch with Daisy's friends, where one of the women mentions a wine cellar below their house, which remains curiously locked, no key to be found. Alec offers to pick the lock, but when he opens the door, what greets them is not a cache of wine, but the stench of a long-dead body. And with that, what was a pleasant Sunday lunch has taken an unexpected turn. Now Daisy's three friends are the most obvious suspects in a murder and her husband Alec is a witness, so he can't officially take over the investigation. So before the local detective, Superintendent Underwood, can officially bring charges against her friends, Daisy is determined to use all her resources (Alec) and skills to solve the mystery behind this perplexing locked-room crime"--

A gripping psychological suspense novel set in Dublin, focusing on two detectives investigating a series of murders in the woods.

A historical mystery about a thug who becomes a detective in Victorian London, set in a small Bihari village in India and filled with skull-lined mansions and underground tunnels.

LAPD detective Hieronymous (aka Harry) Bosch is a loner and a nighthawk. Called out on a routine drug overdose case, Bosch soon realises that the victim found lying in the Mullholland Dam drainpipe is no accident case. Billy Meadows was a fellow 'tunnel rat' in Vietnam and Harry swears to bring the killer to justice.

"One morning before dawn at her regal country estate, Lady Lavinia Truelove is crushed to death by a horse. Classified as "death by misadventure," this appears a gruesome accident, but Scotland Yard Detective Joe Sandilands suspects foul play--a misgiving he is struggling to separate from his personal grievances toward Sir James Truelove, who is Lady Lavinia's widower and the influential academic patron of Dorcas Joliffe, whom Joe one day hopes to marry. As Joe's investigation yields surprising secrets about one of England's most powerful families, he discovers how little he knew about not only the gilded lives of the moneyed, but also about his relationship with Dorcas. Is Joe prepared to risk a future with the girl he loves to uncover the truth behind Lady Truelove's death?"--