I've read some of the books listed, but the two books that completely changed how I write code weren't---_Writing Solid Code_ by Steve Maquire and _Thinking For

I've read some of the books listed, but the two books that completely changed how I write code weren't---_Writing Solid Code_ by Steve Maquire and _Thinking Forth_ by Leo Brodie. The second one is by far the more mind bending of the two, and it's available online (for free) if you search for it.