"Killing in the shadows" by Kate Ellis

An audio book set in York (though it's unnamed).

Little Freya is visited at night by a little girl Anna. Her brother Tom is visited by Jack. Lexi Verity, a TV presenter, is found dead in her swimming pool, stabbed. Her husband's a Lord. Her first husband's a TV actor. He's been paying Lexi's chaffeur and housemaid for information. Nathan Cord, who used to stalk her, has been recently released. Her ex-boyfriend, a chef, has asked her for loan. She's been having an affair with the gardener. Carling, a psychic who Lexi used, has bouts of authenticity that help the police. Sirus, who's making recreations of local murders in a museum exhibition, does an inexact recreation of Lexi's death. A museum worker is the ex of a policeman.

Douglas, the boss of a gambling firm (an ex-cop) is found dead, stabbed. He had a daughter, Izzy (18), out of wedlock. He'd just gone to a solicitor to change his will in Izzy's favour.

There'd been a fire in the house where Freya lives, when it was a pub. A child had died. The father (a widower) had committed suicide. The child's nurse, Matilda Smith, had been sleeping with him. Lexi's housekeeper had found docs and a birth certificate showing that Lexi had been Matilda. Bobby, a half-sister of Anna, is becoming a nun. She realised recently that Lexi might have been Matilda. Lexi had lied to police about Bobby to protect her from accusations of arson.

Penny lives in the house next to Freya's family. She's a solicitor (the one that Douglas saw). She used to be a barmaid in the pub and had a key for it. She fancied the owner. She's lit the fire. She hated Lexi and was worried that her next TV series about crimes would involve her. Douglas recognised her. She's arrested in the museum while she's looking after Freya and Tom.

PoV is quite tightly controlled but only at the expense of people having very expressive eyes, etc - e.g. "Ben thought he could see a knowing look in her eyes". Police are happy to tell suspects (or Lexi's agent) about what other suspects have said. There are many suspects and interconnections between them - much more plot than psychological depth.

Other reviews

• Carol Westron (It is an excellent story, with engaging central characters that depict the police as human and vulnerable, but also caring and decent people. The plot is complex but coherent, with many skilfully laid false trails)
• classicmystery (So many seemingly disparate threads that come together slowly to form a complete picture. Things that seemed irrelevant suddenly becomes part of the main plot, but in a way that makes sense. ... And while there’s a supernatural element in the story, it just enhances the mystery rather than distract from it.)