I'm not sure which domain of History these books fall into so I thought I'd ask here.
I tried searching for books with 'Strategy' as a keyword. Most of them, though, seem to deal with business practices. Anyway, are there similar books like these? These books seem to have a philosophical bent to them, which make them enjoyable to read.
The Prince - Machiavelli
Diplomacy - Kissinger
Books on game theory from any number of sources... would likely be a good addition to that list.
I'd also recommend the /r/geopolitics booklist found here.