48 books • 5 series
Book #1: Robert Ludlum’s The Hades Factor
Book #2: Robert Ludlum's the Cassandra Compact
Book #3: Robert Ludlum's The Paris Option
Book #4: Robert Ludlum's the Altman Code
Book #8: Robert Ludlum's(tm) the Ares Decision
Book #1: Fade
Book #1: American Assassin
Book #2: Kill Shot
Book #3: Transfer of Power