The Sword of Summer (Magus Chase and the Gods of Asgard) by Rick Riordan
"I couldn't breath. Th pain was so intense I felt every cell in my body explode in a chain reaction. Despite that, a strange sort of calm fell over me: I was dying."
Magnus Chase is a kid who has not had it easy. His mom dies when he was 14 years old and he has been on the run ever since. His mom warned him him to stay away from his family, but now they are looking for him. Now he has to follow his uncle because his life in endangered. He has to call a sword that has to be found and claim it as his before the bad guys get to use it.