I recommend John Owen’s works. Admittedly, his writing is dense and difficult, being 350 years old. However, there are many helps available to aid understanding of his writing, many notes and modern language updates. Here is one from Meet the Puritans. It is very much worth it to pursue a study of Owen’s monumental books.
Here is Texas Poet Kay Cude with her thoughts sprung from Owen’s work Mortification of Sin. Used with permission. Right-click to open larger in new tab