Troy Brownfield 
Legend of Isis: The New Kingdom #4 [EPUB ebook] 

The invasion fleet of the Children of Set has Earth in their sights! Thanks to the last-second arrival of The Midnight Witch, Isis and the White Jackal have one last chance to stop Set’s conquest. It will take everything Isis has, and one more unexpected ally, to turn the tide and save the planet from Set’s reign. It’s the final chapter of Isis: The New Kingdom!