upside down moon

I'm looking for something probably a book (doculmntairy is also good) (pre copernicus if possible) of sailors travelling past the equator and seeing different stars and a upside down moon (given the time period I'm thinking off it probably portugese. Does anyone have any interesting reads considering seeing a different nightsky and sailors reaching summer in december and winter in august?

PS I'm only interested in OTL (no ATL timelines for this)