Reddit reviews American Commodities Age Of Empire

General historical geography books that are good:

Key Concepts in Historical Geography

Hodder Arnold Historical Geography (and in general I've found Hodder Arnold review texts to be useful.)

For books that are works of historical geography, broadly defined:

Late Victorian Holocausts (I actually found this book a bit disappointing, but a lot of people like it.)

The Hungry World (actually written by a historian so not very embedded in historical geography theoretically but very much in the same spirit which might be useful for you.)

American Commodities in an Age of Empire (Mona Domosh is currently president of the AAG.)

For the theory of/in geography:

For Space

This syllabus from Rutgers covers a lot of the most essential texts in human geography. I think you could skip the books and stick just to the articles and still have a really good understanding of the field.