The Secret World: A History of Intelligence

Not the IQ type, but the espionage type.

Good reviews at 69%, but with glaring weakness on communist countries, which appears to demote this book significantly because the Russians are masters of oppression - so that learning their toolkit would help an avid Global Steward understand how to negotiate such oppression better.

https://www.amazon.com/product-reviews/0300248296/ref=acr_dp_hist_4?ie=UTF8&filterByStar=four_star&reviewerType=all_reviews#reviews-filter-bar