16 books • 5 series
Book #1: Mind of a Killer
Book #2: A Head for Poisoning
Book #3: The Bishop's Brood
Book #4: The King's Spies
Book #5: The Coiners' Quarrel
Book #7: Bloodstained Throne
Book #1: Murder in the Holy City
Book #1: Murder in the Holy City: An 11th Century Mystery Set During the Crusades
Book #8: A Dead Man's Secret