While working at pleasant but mundane summer jobs in San Francisco, fifteen-year-old twins Sophie and Josh suddenly find themselves caught up in the deadly, centuries-old struggle between rival alchemists Nicholas Flamel and John Dee over the possession of an ancient and powerful book holding the secret formulas for alchemy and everlasting life.

Fifteen-year-old twins Sophie and Josh Newman continue their magical training in Paris with Nicholas Flamel, Scatty, and the Comte de Sant Germaine, pursued by Doctor Dee and the immortal Niccolo Machiavelli.

"The twins of prophecy have been split. Nicholas Flamel is near death. John Dee has the swords of power. And Danu Talis has yet to fall. The future of the human race lies in the balance--how will the legend end?"--Provided by publisher.