Yes, read David Simon's books again. Now that you've seen so much of his stuff fleshed out on TV, you will recognize a lot of it in the books.
My imagination picturing those scenes many years ago was completely trumped by watching many of them on TV. You'll get a whole different perspective now......
It was great fun recognizing the scenes as they unfolded in Homicide, then The Wire, and The Corner.
I don't watch much TV, but I have seen every single episode of these three compelling dramas. Glad to see that Walter likes his stuff, too.