Go back in time, fifty years before the events of New York Times bestselling author P.C. Cast's Partholon books... Something isn't right at Guardian Castle, and Aine can't figure out what. As Healer, she's supposed to be making things better, but there's a darkness that can't be brightened. And then Aine finds an injured Fomorian—winged, dark, blood-thirsty and inherently evil. Or is he? Because there's something about Tegan that Aine can't resist...and once they've shared blood, Aine realizes that everything she's always believed is going to be cast aside....

The most excitement teacher Shannon Parker expected on her summer vacation was a little shopping. But then her latest purchase—a vase with the Celtic goddess Epona on it—somehow switches her into the world of Partholon, where she's treated like a goddess. A very temperamental goddess... It seems that Shannon has stepped into another's role as the Goddess Incarnate of Epona. And while it has some very appealing moments—what woman doesn't like a little pampering now and then?—it also comes with a ritual marriage to a centaur and the threat of war against the evil Fomorians. Oh, and everyone disliking her because they think she's her double. Somehow Shannon needs to figure out how to get back to Oklahoma without being killed, married to a horse or losing her mind... .

Finally settled into her new world and role as the Goddess Epona s Chosen, Shannon finds herself loving her life of luxury and service more and more each day. Her handsome husband is due to return from his travels soon, and the temple and its people have recovered from the terrible war months before. Even though the evil has been banished from the land and all is calm, Shannon can t seem to shake the cloud of uneasiness (and nausea) she s been feeling, even after she receives the wonderful news of her forthcoming bundle of joy. But when a routine ride through the countryside turns dangerous, Shannon is once again pulled across the divide back to the rolling green of Oklahoma. Sensing the darkness growing in her former world and driven by Epona s steady hand, she must rely on the tempting and sexy Clint Freeman to help her defeat the all-too-familiar evil that lurks in the shadows before she can return to her real home Partholon.

Morrigan Christine Parker finds that turning 18 carries a heavy weight when you're the only daughter of Rhiannon MacCallan, disgraced high priestess to the goddess Epona, in Cast's down-home follow-up to 2006's Divine by Choice. After Rhiannon betrayed Epona, the goddess bestowed her favor on Rhiannon's look-alike, Shannon Parker. Rhiannon promised her allegiance to the evil god Pryderi, but recanted after Morrigan's birth, giving the child over to Epona's protection and the care of Shannon's parents. Now Morrigan comes of age and learns more about her heritage from her adoptive grandparents and the wind-borne whispers of Pryderi and Epona. While visiting the Alabaster Caverns State Park and exploring her power over rocks and crystals, Morrigan is unexpectedly transported to the mystical realm of Partholon, where she must find Shannon and fulfill her destiny.

This follow-up to Goddess by Mistake returns to the ancient Greco-Roman civilization of Partholon. Marked from birth as belonging to the Goddess Epona, an isolated Elphame must confront her people's ancient enemies while on a journey of self-discovery.

In this follow-up to Elphame's Choice, Brighid flees her centaur clan's rigid traditions and prejudice to find peace and acceptance among the humans of Clan MacCallan. When her family summons her home, Brighid must make a fateful decision.