Stephen Shore said something along the lines of; when a child is learning to walk, he doesn't think about walking, but where he's going. I bought Barry Thornton's Edge of Darkness book last year, which covers development, acutance and this vs that to the nth degree. It's surprising how much of it is irrelevant now - and I'd dare say most of it didn't matter much in the first place. With all due respect to the man, I'm sure he provided hours of contentment for a lot of darkroom hobbyists, but I'd never want to see their pictures. The only craft books I take seriously are by accomplished photographers - these are the only people who can teach us what technique really means. Second time I've mentioned it this week, but get John Blakemore's Black and White Workshop. You come away from reading that book with a real earthy sense of photographic craft.