P.C. Cast 
Divine By Choice [EPUB ebook] 

"Oh, man! It’s like I’m friggin Wonder Woman or something. " Suddenly Clint stopped and turned to face me. "Not like a superhero, like a goddess. " After being mistaken for a goddess in the mythic world of Partholon (easily done), Shannon Parker now adores her new life. Everything – particularly all the goddess worshipping – is going great…until she’s wrenched back to Oklahoma. Desperate to return to the husband and world she loves, she’s got to draw on dormant power from our world to take her back.But Shannon soon realises she’s being followed by an ancient evil… Sometimes being divine by mistake is a lot easier than being divine by choice.