Shadows appear to be counter-examples to the causal theory of perception. After all, an absence of light cannot reflect light into our eyes. Roy Sorensen sets out to resolve this anomaly and to show how the causal theory solves a broad range of visual puzzles about dark things. Sorensen's book is certainly fascinating and richly thought-provoking... he argues carefully and clearly in favour of his key claims, all of which merit very serious consideration, even if they sometimes provoke one to construct and defend alternative views. That, however, is surely the hallmark of the very best kind of philosophy writing. Seeing Dark Things is a model of this kind.