Book excerpt: Secrets of the Lost Symbol is an essential resource for Dan Brown fans who want to know the facts behind the fiction. From Abramelin the Mage to the Zohar, this encyclopedic unofficial companion guide to The Lost Symbol uncovers the forgotten histories of arcane traditions that have shaped—and still inhabit—our modern world. Discover the truth about Freemasonry—a major theme in Brown's best-selling novel—including its rituals, temples, and infamous members such as the legendary Albert Pike. Get the real story behind the Rosicrucians, the Temple of Solomon, and ancient occult rites.