Shadow of the Sacred Islands (Hardcover) (ISBN-13: 9781504362030)

After facing many dangers, Korina, Sage, Elijah, and Teressia have miraculously made it to the Sacred Islands, the presumed source of dark magic that threatens their homeland. While exploring the islands, the group stumbles upon the terrifying truth of the dark magic, a force that can destroy their country and life as they know it.
Meanwhile, August and Headmaster Ignatia witness the horrors of the mutations back in Elementa. With the country of Lux on the brink of a civil war, time is running out for the four young mages to put a stop to the advancing evil.