Start with high-confidence international taxation books, then narrow by subgenre or adjacent topics.
GATS 2000
Pierre Sauve, Pierre Sauveu
Copyright in Historical Perspective
L. Ray Patterson, Lyman Ray Patterson
Taxing Consumption in a Global Economy
Harry Grubert, Scott T. Newlon
Tariff Retaliation
Joseph M. Jones Jr.
How America Was Tricked on Tax Policy
Bret N. Bogenschneider, Bret Bogenschneider