I would like to buy Ansel Adams' books The Camera, The Negative, and The Print. As they are not available in bookshops here (I can only order them), I don't have a chance to go and leaf through them, and have a look at what's the content. I want something that is rich on information and advanced enough to come back to it repeatedly; not a book which I read once and then put on the shelf. Maybe it's daring to even think of Adams' books this way but they are quite expensive and I want to make a right investment. Could you please give me any references on them? Thanks.