Along with his Caine series, I highly recommend two earlier novels by Stover set in the ancient world ten years after the fall of Troy, "Iron Dawn" and "Jericho Moon." Either could be read as a stand-alone novel, but if you read one, you'll want to read both.
In "Iron Dawn" Stover manages to turn the gentler Marion Zimmerman Bradley "Mists of Avalon" paradigm on its head, giving us a story that's an original blend of historical fiction and fantasy. Its protagonist is a tough, resourceful Pictish warrior Barra and her two companions, an Athenian veteran of Troy, Leucas, and Kheperu, an exiled Egyptian ex-priest and con man. As a mercenary, Barra navigates the ancient world of Tyre and its neighboring lands with cunning and hard-worn battle experience. This novel is a far cry, though, from the "mercenary with a heart of gold" types that litter the fantasy market. Instead, Barra is complicated, thorny, at times vicious, loyal, and always a warrior first. If you're looking for a read with a sentimental edge since the protagonist is a woman, look elsewhere. This is a brutal, violent novel, because it realistically depicts a time when life generally was "solitary, poor, nasty, brutish, and short." Barra does manage to rise above Hobbes' doctrine of human existence from time to time, but it's a constant struggle for her and her companions to do so when most around them are more than happy with maintaining the status quo of 1200 B.C.
Besides his brilliant characterizations, Stover brings the ancient world to life in a rich way that few authors I've read have managed. Most depictions of the ancient world tend to be one-dimensional. If it's a novel of Ancient Egypt, well, Egypt is all you get. The same is true of Greece and even the Roman Empire. But Stover shows just how global and cosmopolitan the ancient Mediterranean world of roughly 3,200 years ago really was, a mix of peoples from as far away as the British Isles (like Barra) to continental Europe (Germanic and Iberian warriors and traders) to the Greek city-states to Troy (in what is today's Turkey) to Jerusalem & Jericho, to Egypt, to Persia and beyond. It's a fascinating, detailed and historically accurate world Stover creates, and that's just one major aspect that makes "Iron Dawn" such a great read.
How "Iron Dawn" and its follow up "Jericho Moon" were not instant successes, I'll never know, but I think that Stover in 1997 simply may have been way ahead of the "strong women in historical/ fantasy" curve so prevalent today. But unlike a lot of what's being publishing today in this genre, Stover's Barra novels are GREAT, and she's more than a worthy predecessor to Caine. I found both novels in an omnibus edition that was published in 1998, "Heart of Bronze."
Do yourself a big favor and order both books together, or order "Heart of Bronze" if you can find it. Then please join me on my campaign to convince Amazon to republish both novels as e-books.