To save his true love, a teenage boy teams up with a group of mythical creatures to stop an evil goddess bent on destroying the world in this adventure-filled fantasy novel.

Concluding the tale of teen adventurer Kyle Dunlop as chronicled in Draupner's Curse and Giants of Anglesey, Yggdrasil: The World Tree pits Kyle against a wicked goddess and her quest to destroy the World Tree.

In a subterranean world beneath our own, the serpent Nidhogg is accidentally set free and begins to gnaw at the roots of the World Tree. Soon the damage it inflicts becomes apparent, and it is only a matter of time before the tree which sustains all manner of life is totally destroyed.

Helreginn, the goddess of the dead, sees this as an opportunity to expand her kingdom. To ensure the serpent doesn't slip away before the tree's destruction is complete, she orders her evil minions to kidnap several fairy maidens to use as sacrifices to appease the ravenous beast.

Kyle Dunlop, along with a group of warrior elves and goblins, a dwarf, and a dragon, sets out for distant Eljudnir to rescue the helpless fairies. But as the rescue party faces one life-threatening challenge after another, Kyle wonders whether he'll ever again see his true love, a captured fairy named Idunn and whether this world he's come to love will be thrown into evil darkness forever.