I was wondering how best to learn some of the in-depth history of the earliest Sumerian settlements. Particularly around 2600-2500 BCE when the Instructions of Shuruppak were written. I'm mainly looking for information on the mundane, day to day life, housing, clothing, cultural norms. That sort of thing.

Obviously there's a lot of websites and books out there relating to this period, but I am finding it difficult to filter out all the ancient aliens nonsense. Any pointers for the best books or online resources?