Good to see Robert Letham's The Westminster Assembly: Reading Its Theology in Historical Context in pre-pub.
It would be great to see the rest of the series (published by P&R):

Scripture and Worship
Biblical Interpretation and the Directory for Public Worship
by Richard Muller and Roland Ward
Reformation 21 review here:
"For those who have been wearied by the countless agenda-driven attempts to drive a wedge between Calvin and the Puritans, or pit "continental" views against Westminster's, this is a massive and long-overdue rebuttal. Muller's contribution is the more original and substantial (behind this essay stands his encyclopedic 4-volume project, Post-Reformation Reformed Dogmatics), but Ward also makes a valuable contribution. I highly recommend this book."

The Faith Once Delivered
Essays in Honor of Dr. Wayne R. Spear
ed. Anthony Selvaggio
Not sure if any more have been published yet, it's hard to find a list online - but that would be a start!