Fires of the forgekeep

"Thor is the god of thunder. Loki is his trickster sibling. Fandral and Sif are their friends -- and sometimes frenemies. And their adventures together have just begun. Thor, Loki, and the others are trapped and separated deep underground, in the Forgekeep of the Dwarves. Even if they solve the maze keeping them apart, they'll have to face a Dwarven warlord, his mechanical army, and one very, very angry All-Father (also known as Thor's dad). Can...