Lunara: Seth Smith

In the ninth book of the Lunara series, Kirkon Tibor, Robin Acadia, and Nathan Blake fight to save humanity from the evil Sephians. They're only hope is to have trust in three of the most unlikely people in order to forge an alliance capable of defeating an enemy undreamt in the worst human nightmare.

On Mars, Naomi Ravenswood is tasked with the greatest responsibly of her lifetime. Not only does she have to find a way to stop the mysterious enemy invading Mars and Earth but she must save the only person she has ever truly cared loved.

Check out the first book in the series, SETH AND CHLOE.