Book excerpt: A century has passed since events of "Alpha Centauri #2: Dragon Sun." Civilization is braced for final reckoning. Science and faith collide as the fanatical Believers of Sister Miriam vie with the technological might of Prokhor Zakharov in a merciless war of destruction. Five besieged factions join the battle against Miriam's zealots as the planet Chiron prepares itself for a new era.