When the people you trust become the ones you should fear most.Elena Vance's nightmare begins on an ordinary November morning. Her daughter Mia, just two years old, collapses without warning. Within hours, she's gone-the same sudden cardiac arrest that killed Elena's husband Arthur two years earlier.But this time, the medical examiner finds something impossible to ignore: poison. A synthesized derivative of gelsemine, the deadly alkaloid found in yellow jessamine plants. Modified by someone with chemistry knowledge. Extracted from cultivated specimens. Administered with lethal precision.Someone murdered Arthur. Someone murdered Mia. And Elena knows exactly who.Julian Thorne. Arthur's godfather. The family friend who showed up with casseroles and sympathy after Arthur died. The devoted godfather who claims to love Leo, Elena's surviving five-year-old son, more than anything.Elena has proof-Arthur's hidden notebook documenting years of embezzlement. A warning from a mysterious colleague. Evidence that Julian spent six weeks in an abandoned pharmaceutical facility learning to extract plant toxins. She knows the truth.No one believes her.To the police, Elena is a grieving widow whose botanical expertise makes her the perfect suspect. To the family court, she's an unstable mother manufacturing conspiracy theories to explain tragic natural deaths. To everyone else, she's the paranoid woman accusing a pillar of the community-a man who only wants to protect his godson from an increasingly unhinged mother.Julian files for custody. The court grants him supervised visitation. And Elena realizes that the man who murdered her husband and daughter now has legal access to her son.She has six weeks to prove the impossible.Armed with her PhD in ethnobotany and her late husband's evidence, Elena begins her own investigation. She discovers that gelsemine comes in two varieties-and the poison in her family's bodies couldn't have come from the American yellow jessamine in her garden. It came from the Asian species, Gelsemium elegans, cultivated in a greenhouse thousands of miles away.A greenhouse Julian bought through a shell corporation. Using a former employee as a front. Planning Arthur's murder for over a year.But proof and belief are different things. Every discovery Elena makes, Julian explains away. Every piece of evidence she uncovers, he dismisses as forgery or coincidence. He's patient. Methodical. And he's already slipped poisoned vitamins into Leo's backpack-stopped only by Elena's vigilance and a rushed toxicology report.The trial becomes Elena's last chance at justice.As the prosecution lays out the evidence-the botanical match between poison and greenhouse, the DNA on laboratory equipment, the timeline of suspicious deaths-Elena watches the jury decide whether to believe a woman fighting for her son's life or a man who's worn the mask of kindness for so long everyone forgot to look beneath it.Because some poisons are beautiful. Some killers are charming. And sometimes the most dangerous weapon isn't arsenic or alkaloids-it's the simple act of not being believed.YELLOW JESSAMINE is a gripping psychological thriller about maternal instinct versus institutional doubt, the science of forensic botany, and the deadly consequences of gaslighting. For readers who loved The Silent Patient, Defending Jacob, and Gone Girl, this is a story about the woman everyone dismissed as crazy-and the truth she refused to stop fighting for.Trigger warnings: Child death (off-page), grief, parental murder, gaslighting, attempted child murder (foiled), custody battles