This is not the cover for book 5. It is a green dragon, not a gold phoenix.
And there is no book 6 in this series, book 5 will be the last novel.

Thanks for the correction! Amazon previously had a listing for the book with the gold cover, which is where our information came from, but that listing now appears to have been removed. We’ll correct the cover and update the series to show that book 5 is the final novel.