Books like Thin Air (Spenser) by Robert B. Parker

Sage Singer, a baker, befriends retired teacher Josef Weber, who asks her to end his life. When his chilling secret surfaces, Sage must decide whether justice or forgiveness is the right path.

Harlan Coben’s thriller follows a man’s desperate search for his missing brother, spiraling into a painful hunt for a killer and the truth behind betrayal and family secrets.

An eleven-year-old boy’s corpse is found in a park, and all evidence points to Flint City’s beloved coach, Terry Maitland. A detective’s quick arrest leads to a tense investigation where DNA, alibis, and hidden truths collide.

The first three Spenser novels showcase the sharp-witted Boston private investigator solving mysteries with acerbic wit, human insight, and a blend of action, philosophy and humor.

Private investigator Spenser is hired by teenage runaway turned madam April Kyle, who runs an upscale all‑female brothel in Boston. When men threaten her business, Spenser uncovers links to organized crime and widespread deception.

Mickey Haller, a cynical Los Angeles criminal defense lawyer, tackles a high‑paying case that turns out to be far more dangerous than it first appears.

Private Investigator Mattie Sullivan uncovers the truth about her murdered mother in Boston's gritty South Side neighborhood while trying to find closure and peace for her siblings and grandmother.

In Rough Weather, Spenser tackles a kidnapping on a private island amid a hurricane, while protecting a wealthy client’s daughter at her wedding and confronting his nemesis, the Gray Man.

A private investigator embarks on a dangerous mission to clear a man's name in a murder investigation after he's wrongly convicted based on a long criminal record.

Private investigator Spenser investigates a theater director's murder in a dangerous world of Chinese mobsters, crooked cops, and a crazed seductress.

A hit-and-run slays an on‑the‑job cop, and the surviving detective turns to Spenser and his crew for retribution in this hard‑boiled mystery.

Private detective Spenser investigates a political and morally complex case involving a dangerous terrorist organization and the woman he loves, uncovering the truth and risking everything to keep Susan Silverman safe.

"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.

When Lisa St. Claire vanishes, a Boston police detective enlists hard‑boiled PI Spenser to uncover her disappearance, tracing clues from a New England college campus to Los Angeles sports clubs and a crumbling tenement in a Massachusetts mill town.

When a woman is murdered, her daughter hires detective Spenser 28 years later to uncover the truth.

Spenser, an unorthodox private detective, tracks the theft of a 14th‑century illuminated manuscript, uncovering a tangled web of organized crime, drug trafficking, radical politics, adultery and murder.