Magnus Chase and the Gods of Asgard, Book 3 The Ship of the Dead

In the final installment of the series, Magnus Chase faces his most dangerous trial yet. With his strong and steadfast friends by his side, including Hearthstone, Blitzen, and Samirah, they must race against time and battle angry sea gods, hostile giants, an evil dragon, and their own inner demons to stop Loki and his army from sailing Naglfar, the Ship of the Dead, and beginning the final battle of Ragnarok.