I am not really an avid reader of reformed literature anymore (I read the occasional John Metcalfe book if that counts). I remember though, when I did hold to the five points, reading a book called “Baptism With the Spirit: The Teaching of Dr Martyn Lloyd-Jones, I remember a chapter or two in that book talked about the Puritan and later Calvinist view of the Witness of the Spirit, and I found it very interesting. I didn’t realise that there were still Calvinists out there who held to that view.