Nico, the son of Hades, and his boyfriend Will, the son of Apollo, travel to Tartarus, the deepest, darkest part of the Underworld, as they attempt to rescue an old friend.

When the god of thunder's hammer goes missing, Magnus Chase and his friends are tasked with retrieving it before an onslaught of giants attacks the mortal world.

Isabelle of Kirklees lives a quiet life inside the sheltered walls of the convent with her mother, Marien. After she is arrested by royal soldiers for defending innocent villagers, Isabelle becomes the target of the Wolf, King John's ruthless right hand. Desperate to keep her daughter safe, Marien helps Isabelle escape and sends her on a mission to find the one person who can help: Isabelle's father, Robin Hood. She is thrust into a world of thieves...