The best novels with a protagonists that help the reader understand their rationale while solving the crime/mystery

Years ago, Lucas Davenport almost died at the hands of Clara Rinker, a pleasant, soft-spoken, low-key Southerner, and the best hitwoman in the business. Now retired and living in Mexico, she nearly dies herself when a sniper kills her boyfriend, the son of a local druglord, and while the boy's father vows vengeance, Rinker knows something he doesn't: The boy wasn't the target-she was-and now she is going to have to disappear to find the killer herself. The FBI and DEA draft Davenport to help track her down, and with his fiancie deep in wedding preparations, he's really just as… show more.

A Wall Street Journal and South Florida Sun-Sentinel Best Book of the Year

“A masterpiece”—LAPD detective Renée Ballard must join forces with Harry Bosch to find justice in a city scarred by fear and social unrest after a methodical killer strikes on New Year’s Eve (Publishers Weekly).

There’s chaos in Hollywood at the end of the New Year’s Eve countdown. Working her graveyard shift, LAPD detective Renée Ballard waits out the traditional rain of lead as hundreds of revelers shoot their guns into the air. Only minutes after midnight, Ballard is called to a scene where a hardworking auto shop… show more.

HAS A NAZI GOLD TRAIN BEEN HIDDEN IN A MOUNTAIN TUNNEL
SINCE WORLD WAR II?

Paul Silver, an international businessman and amateur adventurer, arrives in Berlin looking for information about a fabled Nazi train full of priceless objects and gold. Along with answers he finds a deranged man who hated him in the past, a man who wants revenge more than life itself.

There have been rumors for decades about a train filled with so much wealth it could fund Hitler’s dream of a Fourth Reich. A Romanian family believes its patriarch, one of Hitler’s trusted officers, possesses a coded… show more.

Ex-military policeman Jack Reacher is a drifter. He's just passing through Margrave, Georgia, and in less than an hour, he's arrested for murder. Not much of a welcome. All Reacher knows is that he didn't kill anybody. At least not here. Not lately. But he doesn't stand a chance of convincing anyone. Not in Margrave, Georgia. Not a chance in hell.

As the only woman homicide inspector in San Francisco, Lindsay Boxer has to be tough. But nothing she has seen prepares her for the horror of the honeymoon murders, when a brutal maniac begins viciously slaughtering newly wed couples on their wedding nights. Lindsay is sickened by the deaths, but her determination to bring the murderer to justice is threatened by her own personal tragedy. So she turns to Claire, a leading coroner, Cindy, a journalist and Jill, a top attorney, for help with both her crises, and the Women's Murder Club is born.