The Twisted Blade — J. Fitzgerald McCurdy

In the final book of J. Fitzgerald McCurdy's bestselling Serpent's Egg Trilogy, 11-year-old Miranda, Nicholas and their friends are once again plunged into another world deep beneath Canada's capital city. Hate the Demon has hatched a plot to destroy the Elves and the spells that seal her prison. To stop her, Miranda will need to find the coveted Twisted Blade. But Nicholas has fallen into the clutches of the Dwarf-snake and Miranda must rescue him as well if they're finally to put an end to Hate's plans. Bursting with strange creatures and epic battles between good and evil, The Twisted Blade propels the series toward a breakneck conclusion.