54 books • 6 series
Book #1: The Calling
Book #1: Endgame: The Calling
Book #2: Sky Key
Book #3: Rules of the Game
Book #1: Project Berlin
Book #2: The Moscow Meeting
Book #3: The Buried Cities
Book #1: Origins
Book #2: Descendant
Book #3: Existence
Book #1: Incite
Book #2: Feed
Book #3: Reap
