Reddit reviews Moral Discourse and Practice: Some Philosophical Approaches

I think this is generally called Emotivism but I may be misunderstanding you, you might be advocating Moral Relativism. In any case, you may want to read J.L. Mackie's essay "Ethics, Inventing Right and Wrong" in a book called Moral Discourse and Practice. That whole book is a nice overview of a number of different contemporary views. I imagine any contemporary ethical theory course, (perhaps there's one up at http://ocw.mit.edu ?) would have relevant materials.

Incidentally, the prof I took contemporary ethical theory from was a Moral Realist (ala T.M. Scanlon) and advocated moral fallibilism.

Are railton's other papers as important? I wanted a hard copy of that, and he has this book:

http://www.amazon.com/Facts-Values-Norms-Consequence-Philosophy-ebook/dp/B001GAQ4J4/ref=sr_1_2?s=books&ie=UTF8&qid=1450125510&sr=1-2&keywords=railton+moral

but it also shows up in this book which is like 20% the price.

http://www.amazon.com/Moral-Discourse-Practice-Philosophical-Approaches/dp/019509669X/ref=sr_1_2?s=books&ie=UTF8&qid=1450125419&sr=1-2&keywords=railton

Are hard copies of his other things worth the money? Or should I just get the cheaper book.

For metaethics, Andrew Fisher has what I've heard is a good introduction, and Alexander Miller has a more advanced introduction that I like.

For political philosophy, Ian Shapiro's The Moral Foundations of Politics is a great introductory lecture series, and he has an introductory textbook based on the lecture series.

For anthologies, I'd recommend Ethical Theory for normative ethics, Moral Discourse and Practice for metaethics, and What's Wrong? for applied ethics.