Gathering Darkness By Rhodes, Morgan

Whoever controls the dark, controls the world. . . Magnus must choose between family and justice as his father, the cruel King Gaius, sets out to find the Kindred - four elemental crystals that give godlike powers to their owner. But Gauis isn’t the only one hunting for this ancient, storied magic…The Rebels, led by Cleo and a vengeful Jonas, are on the hunt so they can use the Kindred to win back their fallen kingdoms. The only certainty in these dark times is that whoever finds the magic first will control the fate of Mytica. A thrilling, epic YA fantasy series for fans of Six of Crows, Red Queen and Game of Thrones.