The Guardian's Inheritance. The Guardian Legacy, #2

The Guardian's Inheritance Branded a fugitive and mourning the capture of her friend, Dr. Kenna Amari returns to Egypt with the world's most dangerous secret-a papyrus that holds the key to immortality. But home offers no sanctuary. A brutal attack by billionaire Silas Thorne's agents shatters her world, forcing Kenna to confront a truth hidden in her own bloodline: she is the last of a secret line of Guardians tasked with protecting history from those who would weaponize it.
Her only hope lies in a cryptic journal left by an ancestor, a map of riddles leading to the legendary Scarab of True Witness-the one artifact powerful enough to counter the papyrus and save her friend. The hunt will lead her from a remote desert monastery to the sunken, forgotten ruins of the Great Library of Alexandria. With Thorne's ruthless security chief on her heels, Kenna must embrace her family's ancient duty and become the Guardian she was born to be, before Thorne can claim the ultimate power and rewrite history in his own dark image.