The Sword of Summer
By Rick RiordanThis is the first book of the series Magnus Chase and the Gods of Asgard. In The Sword of Summer, 16-year-old Magnus Chase lives on the streets of Boston when he discovers that he is the son of Norse god Frey. His uncle tasks him with finding a sword to protect him from a fire giant named Surt. Magnus attacks the fire giant but dies saving the civilians on the bridge. Magnus wakes up in Hotel Valhalla, the place where einherjars go for their bravery.