This book is a Second Edition of our highly acclaimed edition. It is written to help the small to large business owner transition easily and effectively to NIST 800-171. This edition includes the added sub-controls for NIST 800-171A for greater clarity, and leverages the original work to provide a comprehensive approach. It is dedicated to the anticipated US Federal-wide government requirement for all businesses, prime and subcontractors, to meet the more expansive implementation of NIST 800-171. This is a how-to book designed to help the novice through professional maneuver this cybersecurity requirement.