The Bruised Reed.
Mark Dever is a bit of a Sibbes expert and enthusiast, mp3 here
The basics idea of Reeves investigation of NPP/FV etc is that they've somewhat misread the reformers on justification, missing their emphasis on union with Christ (i.e. in Luther). Calvin is very strong on Union with Christ in The Institutes, for example. Something that evangelicals in general have missed, ending up with a flat-photocopied version of the reformers theology. Reformed justification doesn't just give us Christ's status, we are given Christ. NPP/FV provide a helpful recall of this, but if we read the reformers right we'd already have this. We can learn from this, but also must query other things. Clarity on this changes our approach to discipleship to be one that doesn't go after the will (as William Perkins did) but after the heart (as Sibbes did). More on that when I get a copy of his notes (the promise of which meant I didn't really take any notes of my own).