“Evicted: Poverty and Profit in the American City” is fantastic, really. It was by far the most recommended book by guests on my favourite podcast and so I has high expectations, but it exceeded them.
I’d also recommend “Down and Out in Paris and London” by George Orwell. It’s a travel-log where Orwell actually becomes a “tramp” in order to best document the experience of homelessness and to meet people experiencing homelessness. Orwell recognised the basic truth about homelessness almost a century ago, and unfortunately nothing really has changed.