Merlin

The battle for Earth starts here.… The Young Knights have travelled to San Francisco to track down Merlin –the only wizard powerful enough to help them create a new magical Round Table. But Merlin is determined to remain incognito, and has reinvented himself as the head of Pip the greatest innovator of the digital age. Meanwhile, the merciless ruler of the Fey realm, King Oberon, is rallying his magical armies for a final assault on Earth. It's only a matter of time before the human world is completely destroyed by hobgoblins, ogres, and dragons. Unless the Young Knights can use all their courage, skill, and cunning to stop Oberon before it's too late.… The final book in the epic Young Knights trilogy.