Start with high-confidence geopolitics books, then narrow by subgenre or adjacent topics.
Pathogenesis
Jonathan Kennedy
Chokepoints
Edward Fishman
Enemy of All Mankind
Steven Johnson
Political Science for Dummies
Marcus A. Stadelmann
The End of the Myth
Greg Grandin
Prisoners of Geography
Tim Marshall
Targeted: Beirut
Jack Carr, James M. Scott
Rebel Island
Jonathan Clements
The Power of Geography
