Books like Song for the Dark Times by Ian Rankin

Sequel to The Long Mars.

In The Big Nowhere, three men become entangled in a vast web of ambition, perversion, and deceit amid the gritty backdrop of Los Angeles.

Inspector Rebus prepares for retirement while seeking vengeance against the corrupt Big Ger Cafferty in a tense Edinburgh police procedural.

"I very much need to be dead." These are the chilling last words left by a man who had everything to live for but took his own life. In the void that remains stands his widow, FBI agent Jane Hawk, surrounded by questions destined to go unanswered unless she does what all the grief and fury inside her demand: Find the truth, no matter what. People of talent and accomplishment, people seemingly happy and sound of mind, have recently been committing suicide in surprising numbers. A disturbing pattern is beginning to emerge. Jane is determined to give up everything to find out why. And if that means going rogue and becoming America's Most Wanted, then so be it. Those arrayed against her are legion, and devoted to protecting something profoundly important-or terrifying-enough to exterminate any and all in their way. But Jane is as clever as these enemies are cold-blooded, as relentless as they are ruthless. And she is driven by a righteous rage they can never comprehend. Because it is born of love.

A gripping collection of seven Inspector Rebus tales, including the elusive "Death Is Not The End," that delves into Edinburgh's dark alleys and the minds of killers, a bent cop, and a hitman caught in a crowded fairground.

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.