What to Read After The Sigma protocol
Readers who loved The Sigma protocol by Robert Ludlum keep reaching for these 24 books. This list is built from where The Sigma protocol is read alongside other books across reader co-reads and book lists. The more independent sources agree on a title, the higher it ranks.
Books to read after The Sigma protocol
The Janson directive
The Scarlatti Inheritance
The Aquitaine progression
The Ambler warning
The Matarese Circle
The Holcroft covenant
The Tristan betrayal
The Parsifal mosaic
The Bourne ultimatum
The Scorpio Illusion
The Chancellor Manuscript
The Rhinemann Exchange
The Bancroft Strategy
The Matarese countdown
The Road to Gandolfo
The Osterman Weekend (Alpha Books)
The Matlock paper
The Paris Option
The Bourne Supremacy (Bourne Trilogy, Book 2)
The road to Omaha
Trevayne
The Man with the Red Tattoo
America
Games of State