I would suggest that you endeavor to obtain books of UK origin as they wil by far get you more in the thought process of both the historical aspects and how the authors of those publications thought and came up with conclusions, not that l woudl agree with all that l have ever read, which more or less amount to every publication produced.
Provided cost is not a factor with you, the majority of these you will or should be able to obtain.
I can let you have a list if you would like, and a contact in the UK to get them, some of which are of course our of print to day.
Davy