What Novels Use Linear System Substitution In Their Mystery Plots?

Elena Cordova designed revolutionary algorithms for a multi-million-dollar company. The only formula she couldn't solve? Her own marriage. After seven years of being the invisible wife to a cold billionaire, Elena is finally trading in her wedding ring for her worth. Marcus Ashford married her for obligation, hid her from the world, and replaced her with a woman who played the perfect stepmother. But when he finally pushes her too far, he discovers that the brilliant, betrayed woman he dismissed has been running calculations all along. Now, Elena is back in the boardroom, her mind sharp, her fortune growing, and a handsome rival billionaire watching her every move. She wants revenge. She wants vindication. She wants her daughter back. Marcus thought she was a social climber. He thought she was docile. He thought he could replace her. He was wrong. He used her for her brilliance. Now, she'll use her brilliance to take everything back. Divorce is just the beginning of her beautiful, calculated comeback.

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?

On her unconscious bed, her husband gave the order to abort her child. Their child. Driven by lust and desperation for power, Killian Powell framed Rose Webster just to divorce her and marry her twin. At what price? To easily buy his way into her family's corporation. Rose had the evidence to expose her husband's true face to the world and tear him down. But of what use was it when her vicious parents threatened to stop the treatment of her sick daughter if she dared release the evidence? Like always, they cared more about what they stood to gain from a traitor who stabbed their daughter—a man they once despised when he was nothing. As much as Rose couldn't trade the life of her daughter, she couldn't bear the internet stigma and mockery. Not to mention her job as a detective was suspended as if she were some criminal. The whole world seemed to close in on Rose until redemption came in the form of a dangerous offer. When solving a risky murder case was the only way to get back at her ex-husband and also keep her child safe, how far would she go to ruin her ex?

“You want to say the person belongs to the same field as you?” Sebastien shrugged his shoulder at Abigail’s question “Don’t you have any doubt on anyone that you think could be behind you?” Abigail shook her head “I wish I could get any hint” there was silence after that. Both have nothing to say about this anymore. When Dylan’s raspy voice took their attention, Abigail raised her eyebrows at him “What happened Dylan?” Dylan took deep breaths to bring back his heartbeat to its proper rhythm “Chloe, her mother received a call” the words that left his mouth were enough to make Abigail and Sebastien leave their places swiftly “What they said to her?” this time Sebastien was one to ask, but Dylan didn’t answer him, he had a pained expression on his face “Dylan? What they said” Abigail’s harsh voice forced him to answer her “They will kill Chloe and they know she is currently out shopping at the supermarket” after listening to him Abigail rushed towards the door ushering him to the side “Wait Abigail” Dylan and Sebastien followed her but she ran fast to save her friend Abigail is finding the suspect of her parent\'s accident, she knows that it was not a normal accident but instead was planned and wants to reach out to the person who was behind it. She has her own team who was working on this but the past holds many secrets and when she starts to dig her team increases, and many characters of the past came forward to help her, somehow they were also affected by that accident. What happened in the past, the secret her mother knows and pays the cost of knowing it.

"He's gone, Elizabeth," her captain Charles Johnston tells her. Elizabeth blinks back her tears. Her face full of shock and disbelief. Her frozen stare interrupted by his words. "He left his badge." "There's no way," she thought. He wouldn't leave her like this. No warning, no phone call, no letter. She was more to him than that or at least so she thought. That conversation has plagued her for 3 years. For 3 long years, Detective Elizabeth Ryan tried to shut out him, to finally be able to move on. But just as she does, he abruptly returns seeking more than what either of them anticipated. Will Elizabeth be able to forgive him, or will the past be too much to swallow? What happens when life throws her too many twists to handle?

With her enemies in pre-civil war Virginia still seeking her death, Esmerelda is forced to return to the future only days after wedding Lance. Because it was necessary to fake her death in order to stop her enemies from following her to the future, her new husband, Lance, was forced to stay behind. He’d placed a magic box for them to communicate until he found a way to safely be with her beneath the floorboards of the house. Now, she must find it. A task that is easier said than done! “The Magic Box” is book two of the exciting paranormal-romance-mystery-thriller Esmerelda Sleuth Series