Is this book any good? When reading the index and the description, it seems to be the book I am looking for. A book about the "theory" of photography, that tries to answer the question "What is photography?". Its approach seems to be serious and "scientific", yet still approachable and a good introductory overview. It also seems to be some sort of reference book that has been around for quite a while. What is your opinion about this book? Is there any other book with a similar topic, concept and reputation?