This challenge is to record books read about different eras and time periods, rather than written or published in that time period. I will be counting classics that are written about a previous time period than the author has lived through. 

I've split most of the prompts into centuries even though those can contain different eras (ex. Age of Enlightenment, Victorian Period) for simplicity and to easily sort non-European periods.

This challenge has no start or end date.