Principled Spying: The Ethics of Secret Intelligence

DEARTH OF BEFALLING PRINCIPLE: SOLILOQUYS OF DAVID

The Spy Method: How to Get a Job Using Intelligence Principles.

A Reluctant Spy: A gripping spy thriller 'perfect for fans of Mick Herron and David McCloskey' (THE SUN)

M David Merrill's First Principles of Instruction: Revised Edition