Notwithstanding all the nuances of the meaning of the term “Puritan” [see Beeke and Jones, A Puritan Theology, pp. 1–5], there is
a new book out on John Bunyan by my friend and colleague in the United Reformed Churches in North America, Rev. Brian Najapfour: The Very Heart of Prayer: Reclaiming the Spirituality of John Bunyan (Mountain Home: Ark.: BorderStone Press, 2012). For more info check it out here.