I think everyone who has an interest in Reformed theology, or just in Christian theology more generally, should read John Calvin Institutes.

In the twentieth century the Reformed tradition was developed in several ways including additional confessions (Barmen, the Belhar Confession, the 1967 Confession of the PC(USA), and so on). It was also significantly augmented by the work of important thinkers like Karl Barth, T. F. Torrance, Jürgen Moltmann, Emil Brunner, Kathryn Tanner, and so on.

[ Jonathan] Edwards is one of my heroes. I've learned much from him over the years.

To my mind [ Jonathan Edwards] is an interesting figure because he is both a canonical Reformed thinker, and yet also someone that pushed the envelope in a number of key areas of theology.

The atonement chapter [from the book Saving Calvinism] shows how there are real riches in Reformed theology that most Christians today have no idea about.

Reformed theology belongs to this confessional tradition, and Reformed theologians and churches continue to write confessions even today.

The Reformed tradition at the beginning of the twenty-first century is different as a consequence of this - and different in nontrivial ways. Some may scoff at this, saying that such "developments" don't represent Reformed thought. But by what standard? Perhaps by the Westminster Confession. But this is only one Reformed confession, and it was only ever a subordinate standard.