How many books are there in the eon series by alison goodman?

Although my desire fore a third book is great, I am sad to say Alison Goodman does not seem to be making plans of a third book. Right now there are only two in this duology,Eon and Eona. Or in some country's Eon is tittled as The Two Pearls of Wisdom and Eona tittled The Neckace of the Gods.