Frank Jackson's "From Metaphysics to Ethics" is a dense, complex essay in analytic metaphilosophy and an equally dense and complex (albeit shorter) essay in the metaphysics of color and in the justification for the existence of moral concepts. Its greatest strength is undoubtedly found in its structure: the first half is devoted to display the so-called "Canberra plan" for philosophical inquiry: what philosophers must do is take concepts from the ordinary use of language (what he calls "folk" language) and refine them by exposing their hidden implications through the use of conceptual analysis. It is only in this way that we can have "serious" philosophy talk. It is obviously a controversial idea, but the arguments are quite strong and, to be fair, convincing.
The second half of the book is an enactment of his meta-theory on actual theories: first, the metaphysical theory of color; then, the foundations for moral concepts. The analysis turns very complex here, but at its core the method is exemplified quite well.