If a whole book is too much, you could also try their article, Economic Lives of the Poor—https://www.aeaweb.org/articles?id=10.1257/jep.21.1.141 - but this is explicitly focused on people living below the extreme poverty line, who are an order of magnitude poorer than the global median.
It’s been years since I read it, but I recall Poor Economics (https://www.amazon.com/Poor-Economics-audiobook/dp/B006ST3XTW/ref=sr_1_4?dchild=1&qid=1625123657&refinements=p_27%3AEsther+Duflo&s=books&sr=1-4) providing significant insight on life at lower levels of income; I think it was probably also informative about the median case.
If a whole book is too much, you could also try their article, Economic Lives of the Poor—https://www.aeaweb.org/articles?id=10.1257/jep.21.1.141 - but this is explicitly focused on people living below the extreme poverty line, who are an order of magnitude poorer than the global median.