Instruct: Classify a given Amazon review as either positive or negative.
Query: Enlightening and challenging

Sontag is first and formost a philosopher. Her book is a series of essays that were first published in New York Magazine and later compiled for this book. As such, each essay is distinct and does segue easily to the next. Be prepared with these tools when digesting On Photography: a French dictionary, an English dictionary and a philosophy reference book i.e. Bloom's Closing of the American Mind. From the first essay, In Plato's Cave and onto through to Through Images Darkly (an analysis of Diane Arbus' work), once must be familiar with Plato's Republic and know what Arbus' photos look like. Be prepared to spend time with this book, it is well worth it!