Odin's ravens

The descendants' of Thor and Loki cannot continue their journey when their friend and descendant Baldwin is poisoned and killed and Matt, Fen, and Laurie must travel to the Underworld in the hopes of saving him. But that's only their first stop on their journey to reunite the challengers, find Thor's hammer, and stop the apocalypse

a journey filled with enough tooth-and-nail battles and larger-than-life monsters to make Matt a legend in his own right.