Donna Gillespie is the author of two novels set in ancient Rome, The Light Bearer (Berkley/Putnam, 1994) and Lady of the Light (Berkley/Putnam, 2006). The Light Bearer has been translated into German, Dutch, Russian and Italian, and was optioned by Hallmark Entertainment for a miniseries. Her second novel, Lady of the Light, is the sequel to Light Bearer, and has been translated into German and Italian. Gillespie lives in San Francisco, where she works as a teacher’s aide in a middle school and is the copyeditor and occasional contributor to her neighborhood newspaper, The New Fillmore. She’s currently working on the third novel of the trilogy that began with The Light Bearer.

Here are a few websites of related interest that are favorites of mine:
A writer's site; she has written two wonderful books about writing
The site of a fine writer whose books also feature a gladiatrix
Who can resist a whirlwind trip through ancient Rome courtesy of Google Earth?
Ancient Romans in their own words — dozens of ancient authors are here, and it's free