To unlock the magic of the Toltec Codex, Clark Ransom must solve the mystery found in three pyramids. Gods and men battle to stop Clark. Cañada de la Virgen in San Miguel de Allende, the great Toltec pyramid at Tula, and the Great Pyramid of Cholula each hold a clue. Can Ransom retrieve Mexico’s most precious treasure? Or will he fail and put us all in jeopardy?