Eternal Journey by Alex Archer 

Wherein our heroine, Annja Creed, in the 17^th episode (of 57), is covering a dig in Australia that is finding Egyptian artifacts.  She and her cameraman stay overnight when the rest of the crew have returned home.  Only in the morning, the cameraman doesn’t get up in time to prepare for their flight.  Annja discovers his room has been ransacked, and then she is attacked.  She fights off her assailants with her charmed sword from Joan of Arc and flees.  She goes into the worst neighborhood of Sydney and is recognized by a young man with a motorcycle, who gives her a ride back to the dig site.  She is worried that whomever attacked her a abducted and/or killed her cameraman may go there and harm the university students working on the site.  She learns that the professor who is sponsoring the dig is actually stealing artifacts to sent back to Egypt.  He is also using terrorists to poison water, first in Sydney, then in Cairo, in an attempt as an offering to Hathor in hopes of gaining eternal life.  This is the first volume to not have an appearance by Roux or Garin.  The series, published by Harlequin, is written by various people.  This is the first written by Jean Rabe.