OK, if you want to read nothing but books on blacksmithing the titles suggested are fine...I've read a number of them myself.
I suggest you take in a few volumes that have nothing to do with the craft. Maybe a journal of an around the world motorcycle trip, maybe a history of Latin America, maybe a collection of poems or a novel from 1965, or a biography of your favourite music star.
Being a good smith isn't just about technique; it's about how you see the world and how you translate that into your work.
Happy reading!