Magnus Chase and The Sword of Summer

The novel opens on the sixteenth birthday of the protagonist Magnus Chase, who has been living on the streets of Boston since his mother Natalie's death two years ago. After learning that his uncle Randolph has unexpectedly sent his uncle Frederick and cousin Annabeth to search for him, Magnus breaks into Randolph's house to look for answers. Randolph catches Magnus and drives him to Longfellow Bridge, cryptically claiming that Magnus is the son of a Norse god, giving him magic powers and placing him in the sights of an unnamed magical enemy. Randolph tells the boy that he must magically retrieve an ancient sword (Sumarbrander, or the "Sword of Summer") hidden in Boston Harbor to protect himself. A fire giant known as Surt appears demanding the sword, and begins to destroy the bridge. Magnus attacks Surt to allow other pedestrians time to escape. As he realizes that he is about to die, he manages to wound the demon and hurl the two of them off the bridge. He dies on impact with the water.