Okay so this is what I got so far
-Trilogy
-Book One:The Sword of Summer
- Magnus Chase is Annabeth Chase's cousin as reveled in the blood of Olympus although she referred to him as her cousin that lives in Boston
-Magnus's mom died
-Magnus is a demigod although he is the son of a Norse god not a Greek or Roman one
-Magnus lives on the streets of Boston
-When he meets his uncle his uncle tells him that he is a demigod