Any good Alternate History books or stories with a South American theatre in WW2?

I know that there were worries about this back in the day since there were some Axis sympathizers in South America so I was wondering if there is a good story with WW2 including large battles in the Western Hemisphere?

Also how realistic would it be for there to have been such a thing happen? Which countries would side with the Axis forces? and how would this affect the post war world?
 
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