Like Galen Rowell, I am a professional photographer specialising in landscape and mountain subjects. Also like him, I am what is sometimes called 'self-taught'- which, of course, means we never took college courses in photography, but have learned from many people, both in person and from books. (Has there been a genuinely self-taught photographer since Fox Talbot?) In my case, one of the most- perhaps the most- significant books has been 'Mountain Light'. There are other photographers who are as good as Galen Rowell, but very few who can write so clearly and illuminatingly about the creative and technical processes involved. Ansel Adams, of course, is the towering exception, but he was principally concerned with black and white large format photography. Galen Rowell speaks directly to those who work in colour and with smaller cameras. Adams is essential reading, but so is Galen Rowell.