A double homicide. A missing sister. A triangle of secrets with only one way out.When Detective Madelyn Castillo and her new partner, Lieutenant Gary Mitchell, are called to the scene of what appears to be a murder-suicide, they quickly realize the truth is far more disturbing. The crime has been carefully staged-and it's only the beginning.Complicating matters, one of the victims is a Naval Reserve helicopter pilot, bringing an intrusive NCIS special agent, Nick Ryan, into the investigation. The case turns personal when Madelyn learns that her sister, Deena, had been secretly involved with the male victim-and that DNA places Deena at the scene of the crime.Then Deena vanishes.Against orders, Madelyn and her siblings begin digging into the mystery themselves, aided by the unsettling presence of the wise-cracking ghost of their deceased sister, Tessa-who appears only when one of them is in danger.As a dangerous stalker closes in and a crucial lead goes violently wrong, Madelyn and Mitchell find themselves trapped in a deadly triangle of obsession, betrayal, and buried truths. With the killer determined to leave no witnesses behind, Madelyn must uncover the truth before her family becomes the final casualties.Deadly Triangle launches A Garcia Girls Mystery with high-stakes romantic suspense, layered family dynamics, and a chilling supernatural edge. Lizbeth Lipperman blends police procedure, emotional urgency, and eerie intuition into a fast-paced mystery where love, loyalty, and survival are dangerously intertwined.