Captain America, Iron Man, Thor, Black Widow, and the Hulk-- Earth's Mightiest Heroes--have assembled to face world-class threats whenever and wherever they might appear. They are the Avengers. Yet some threats transcend the ages. Centuries ago, a never-before-seen group of heroes gathered as the Avengers of their ancient era to fight the Zodiac, foes who wielded unimaginable arcane energies channeled through a mysterious Key. The resulting battle devastated vast swaths of the planet. The Key was lost, and the Zodiac went into hiding, influencing world events from the shadows, waiting for the stars to align to usher in their return. When strange beings exhibiting the traits of the twelve astrological signs appear in the 21st century, the Avengers again answer the call to assemble. But when this modern team of heroes is forced to divide their efforts, each encounter leads to their opponents gaining strength. Once again, the hunt is on for the Extinction Key... and if the Avengers don't find it, our world will be lost. Greg Keyes was born in Meridian, Mississippi. He earned a bachelor's degree in anthropology at Mississippi State University and a Master's degree at the University of Georgia. While pursuing his PhD at UGA, he wrote several novels, one of which -- The Waterborn -- was published, along with its sequel, The Blackgod . He followed this with the Age of Unreason books, the epic fantasy series Kingdoms of Thorn and Bone, and numerous franchises, including Star Wars, Babylon Five, The Elder Scrolls, and Planet of the Apes. He now lives and works in Savannah, Georgia with his wife Nell, son Archer, and daughter Nellah. Seth Podowitz has always been a storyteller. He began his career as a composer for film, television, and video games and then later worked as a voiceover director for talent agencies and independent productions. Having now spent over fifteen years in voiceover as a director, a teacher, a consultant, and even an agent, he has shifted his focus to audiobook narration.