18 books • 3 series
Book #1: By the Blood of Heroes
Book #2: On Her Majesty's Behalf
Book #1: Eyes to See
Book #2: King of the Dead
Book #3: Watcher of the Dark
Book #1: The Heretic
Book #2: A Scream of Angels
Book #3: A Tear in the Sky
Book #4: Infernal Games
Book #5: Judgment Day