How Do The Best Ever Crime Novels Build Suspense Without Revealing The Culprit?

Murder Inquiry is a crime fiction, whose plot is about Edwin Wolfgang, a rich New York based banker, who gives out loans for which he accepts artworks as collateral, but kills his customers before they are able to pay back the loan. And a FBI agent attached to the New York field office, who's charged with the task of bringing Mr Wolfgang to book. The story is set in three cities, in three different continents, and is full of twists and turns from the killing of Wolfgang's last two victims, up to his eventual arrest.

When Emma's sister vanishes, she's thrust into a deadly game of cat and mouse. A mysterious figure, hidden behind a mask, demands Emma play a twisted game of puzzles and clues to rescue her sister. With time running out, Emma must use her wits to unravel the mysteries and face the sinister forces behind the game. But as the stakes grow higher, Emma realizes the game is designed to test her limits, and the truth about her sister's disappearance may be more terrifying than she ever imagined. Will Emma solve the puzzles and save her sister, or will she become the game's next victim?

Summary: Inspector Thomas Bertrand, a methodical and respected police officer, is tasked with investigating a mysterious murder. The evidence seems to point to the assassin being a beautiful and young woman, Isabelle Dufresne. But as soon as he meets her, an irresistible attraction grows between them, a feeling that deeply unsettles him. The battle between his duty to justice and his growing emotions for Isabelle leads him into an intense inner struggle. As the investigation progresses, he discovers that nothing is as it seems and that dark forces are manipulating the truth. His heart and mind are in conflict, and the hidden truth could very well destroy him.

When a young Investigative journalist gets a job in the city, she meets a secret killer who they both develop feeling for each other. What would happen when she gets a task to track the unknown killer and have crucial information about him? How would she react when she founds out he is a killer? Would he manage to kill her before his story goes viral?

A series of past murders catch the attention of the police and the media. All the people who were killed were women, all of which had some sort of relationship with a well known and successful businessman named Asriel Parker. For some reason, the murders all point to him as the number one suspect and connection between them. The reasonable thing to do is to put him behind bars but there is one problem. "Everyone is innocent in the eyes of the law until proven guilty." There isn't a shred of evidence that actually pinpoints Asriel Parker as the culprit. With that statement in mind, Selena March, a good police officer and detective is sent undercover as his live-in Personal Assistant to dig up whatever information she can use to put the murderer behind bars. Selena has no idea what she signs up for but she knows for a fact that falling in love is not part of the whole 'undercover' mission

He promised to protect him from a killer. He never said he was one. When journalist Ian Parker witnesses a brutal murder, he should have been the killer's next victim. Instead, he wakes up in the hospital, saved by Zhedya Hunter…a brilliant forensic pathologist, a reclusive CEO, and a man with chilling grey eyes that feel hauntingly familiar. Charismatic and dangerously possessive, Zhedya offers Ian shelter in his opulent penthouse, a gilded cage where every comfort is a chain. As Zhedya's obsession deepens, Ian's career skyrockets, with damning evidence against the city's most wanted criminals mysteriously falling into his hands. But each exclusive story comes with a price: a fractured memory, a drugged haze, and a growing pile of bodies connected to anyone who threatens their twisted paradise. Now, Ian is trapped in a nightmare of luxury and lies, unraveling a truth more terrifying than any headline: his savior is a predator, his sanctuary is a crime scene, and the man who claims to love him is the most prolific murderer he will ever interview. Learning how to love a murderer is easy. Surviving him is the real story.