High school English teacher Shannon Parker feels drawn to an ancient urn depicting the goddess Epona, but she is initially outbid for it at an auction. However, thanks to a tiny crack, she is able to claim it, not realizing that it will be the catalyst that sweeps her out of this world to a parallel one. During a storm, she passes out, coming awake in a veritable palace and being addressed as "my lady".

Fortunately, the woman who greets her, Alanna, knows what is going on; Epona's High Priestess, Rhiannon, exchanged places with Shannon. Now, Shannon is forced to be someone she's not and live with the consequences of looking exactly like a woman who was, from all accounts a witch with a capital B and a tramp. She is determined to clean up Rhiannon's mess, starting with treating Alanna, as well as everyone else, decently.

If that wasn't enough, she finds herself handfasted to a centaur, ClanFintan, but she quickly realizes that this is a positive aspect of the switch. On the minus side, her new world is in the middle of a war with monstrous beings called the Fomorians just as a long defeated in this world disease sweeps through the land. Shannon may have thought it was a battle to drum English literature into teen-aged heads, but now, she knows what a real war is.

When I first read Goddess by Mistake, the initial version of this book, I loved it. However, the new version is even better. Shannon is a smart, funny heroine who is genuinely likeable. Ms. Cast has created a new world that is shaded with familiar myths, but is still original. Drama, suspense, and humor will keep you spellbound to the end. Even if you read the first version, give this extended edition a go. Just as the reissued, expanded DVDs of well loved movies are an improvement on a good thing, so is this.