The Last Door: An Archaelogical Adventure Romance. The Meridian Arc Trilogy, #3

Some doors were never meant to be opened. Some were built to decide who survives. After uncovering the secrets of the Sun Ledger and the Serpent Compass, archaeologist Dr. Elena Marquez thought she understood the Meridian Arc: an ancient network of warnings hidden beneath myth, treasure, and blood-soaked history. She was wrong. The final trail leads north into the Arctic dark, where a lost expedition vanished into the ice more than a century ago, and where the Meridian Trust has been waiting for its last chance to turn warning into power.
Beneath the frozen sea lies the Meridian Vault, a place built not to protect treasure, but to preserve the most dangerous knowledge humanity has ever buried. Elena is not alone. At her side is Gabriel Cross, the former covert operative who has become her partner in every way that matters. Together, they have survived jungles, deserts, betrayal, and the shadow of Elena's father's secrets. But the Arctic offers no mercy, and the enemies closing in are no longer only hunting artifacts.
They are hunting control of the future. As a ruthless consortium moves to seize the Vault, a haunted adversary forces Elena into an impossible choice: release the warning and risk global chaos, or keep it buried and let the powerful decide who gets to live. The deeper Elena and Gabe go, the more they uncover a chilling truth: the Meridian Arc was never about ownership. It was about witness. And once the Vault opens, every buried crime, every erased name, and every private warning bought with someone else's death will come into the light.
The Last Door is a cinematic archaeological adventure thriller packed with ancient mysteries, Arctic danger, high-stakes conspiracy, and slow-burn romantic tension. Perfect for readers who love action-adventure, historical secrets, dangerous expeditions, and heroes forced to risk everything for the truth. The final door is opening. And this time, history will not stay silent.