Magnus Chase And The Hammer Of Thor by Riordan Rick [Paperback]

Thor's hammer has gone missing once again, but this time it's in enemy hands. Without it, the mortal worlds are vulnerable to a giant invasion, and Ragnarok could be imminent. Magnus Chase and his friends must retrieve the hammer before chaos erupts. However, their only hope lies in striking a deal with Loki, the gods' most dangerous enemy. The price he demands is steep, putting everything at risk in this thrilling adventure across the Nine Worlds.