I want to get much better at photography, specifically using film. I know and recognize the advantages and capabilities of digital. But hear me out.
I want to improve my digital photography. In doing so, I'd like to learn where photography started. That is film. I purchased an older 35 mm film camera with interchangeable lenses and am working with it. But things like film speed, light measurements, etc. are all things that I have to be very diligent about where as digital I could make adjustments on the fly, knowing the results, but not truly understanding why the results.
So, I have two questions for you. If I wanted to really excel at film photography, what single book would you say stands above the rest (keep in mind mathematical equations on focal points, light calculations, image composition, etc) and how would you measure your growth and success?