One of the things we in the Reformed tradition are very good at is writing doctrinal theology!

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

For instance, there are many mainstream Reformed theologians that deny the doctrine of "limited" atonement (the "L" in TULIP, the acrostic for the Five Points of Calvinism). These are not thinkers on the margins or troublemakers. They are leaders at the center of Reformed thinking like Bishop John Davenant.

[ Jonathan] Edwards is the person who really made theological determinism a serious option for Reformed thinkers, and the influence his views had in nineteenth century Reformed thought, in the USA and the UK in particular, is enormous.

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.

For those interested in Reformed thought more broadly, I'd recommend Peter Leithart's recent book on Reformed Catholicism entitled, The End of Protestantism: Pursuing Unity in a Fragmented Church (Brazos Press, 2016), as a thought-provoking and stimulating read that should get us all thinking about the future shape of the Church, wherever we come from.

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