Magic to the Rescue by James Hartley
Approx. 55,090 words.
Published on October 9, 2012 by
One hundred and ninety years after the Wiccans settle on Oz, another Earth ship arrives and tells them that the situation on Earth is bad and getting worse. The Wiccan Council sends an expedition to Earth on the Wicca Glory, to try to fix things, by bringing Magic to the Rescue.