Amazon.co.uk: the nag hammadi library: Books (no date). Available at: https://www.amazon.co.uk/s?k=the+nag+hammadi+library&i=stripbooks&crid=2EIVUDJUQMKC2&sprefix=the+nag+hammadi+%2Cstripbooks%2C153&ref=nb_sb_ss_i_2_16.
Armstrong, K. (2006) The great transformation: the beginning of our religious traditions. 1st ed. New York: Knopf.
Armstrong, K. (2010) The case for God: what religion really means. London: Vintage.
Avicenna and Marmura, M.E. (2004) The metaphysics of The healing: a parallel English-Arabic text = al-Ilahīyāt min al-Shifāʼ. Provo, UT: Brigham Young University Press.
Baggini, J. (2019) How the world thinks: a global history of philosophy. [S.l.]: Granta Books.
Barnstone, W. and Meyer, M.W. (2009) The Gnostic Bible. Rev. ed. Boston: Shambhala.
Bayne, T. (2018) Philosophy of religion: a very short introduction. First edition. Oxford, United Kingdom: Oxford University Press.
Boyer, P. (2002) Religion explained: the human instincts that fashion gods, spirits and ancestors. London: Vintage.
Classical Arabic Philosophy (no date). Hackett Pub Co Inc. Available at: https://ebookcentral.proquest.com/lib/uea/detail.action?docID=317398.
Cooper, D.E. (2003) World philosophies: an historical introduction. 2nd ed. Oxford, UK: Blackwell.
Cottingham, J. (2014) Philosophy of religion: towards a more humane approach. Cambridge: Cambridge University Press. Available at: https://doi.org/10.1017/CBO9781139094627.
El-Rouayheb, K. and Schmidtke, S. (2016) The Oxford handbook of Islamic philosophy. New York, NY: Oxford University Press. Available at: https://uea.idm.oclc.org/login?url=http://www.oxfordhandbooks.com/view/10.1093/oxfordhb/9780199917389.001.0001/oxfordhb-9780199917389.
Fox, R.L. (2017) Augustine. New York: INGRAM PUBLISHER SERVICES US.
Hadot, P. (1993) Plotinus, or, The simplicity of vision. Chicago: University of Chicago Press.
Harvey, G. (2014) The handbook of contemporary animism. Abingdon, Oxon: Routledge.
Henry Corbin (2014) Avicenna and the Visionary Recital: (Mythos Series) (Bollingen Series (General)). Princeton University Press; Reprint edition. Available at: https://www.amazon.co.uk/Avicenna-Visionary-Recital-Bollingen-General/dp/0691600708/ref=sr_1_fkmr0_1?keywords=henri+corbin+avicenna+and+the+mystical+recital&qid=1557320088&s=books&sr=1-1-fkmr0.
Jenny Rose (2011) Zoroastrianism. London: I. B. Tauris. Available at: https://ebookcentral.proquest.com/lib/uea/detail.action?docID=762980.
Kindī, Adamson, P. and Pormann, P.E. (2012) The philosophical works of Al-Kindī. Oxford: Oxford University Press.
King, K.L. (2003) What is Gnosticism? Cambridge, Mass: Belknap Press of Harvard University Press.
Kriwaczek, P. (2004) In search of Zarathustra: across Iran and Central Asia to find the world’s first prophet. 1st Vintage Departures ed. New York: Vintage Departures/Vintage Books.
Lacarrière, J. (1977) The Gnostics. London: Owen. Available at: https://ebookcentral.proquest.com/lib/uea/detail.action?docID=1768044.
Magee, G.A. and Magee, G.A. (2016) The Cambridge handbook of western mysticism and esotericism. New York: Cambridge University Press. Available at: https://uea.idm.oclc.org/login?url=https://doi.org/10.1017/CBO9781139027649.
Manichaean Writings -- The Gnostic Society Library (no date). Available at: http://www.gnosis.org/library/manis.htm.
McDonald,James (no date) ‘Cathars and Cathar Beliefs in the Languedoc’, Cathars and Cathar Beliefs in the Languedoc [Preprint]. Available at: http://www.cathar.info/doc_lyons_ritual.htm#transmission.
Meyer, M.W. and Bloom, H. (no date) The Gospel of Thomas: the hidden sayings of Jesus. 1st ed. [San Francisco, Calif.]: HarperSanFrancisco.
Nag Hammadi Library (no date). Available at: http://www.gnosis.org/naghamm/nhl.html.
Oldenbourg, Z. (2000) Massacre at Montségur. London: Phoenix Press.
O’Shea, S. (2000) The perfect heresy: the revolutionary life and death of the medieval Cathars. London: Profile.
Pagels, E.H. (1979) The gnostic Gospels. 1st ed. New York: Random House.
Plato and Gill, C. (1999) The symposium. London: Penguin Books.
Plotinus, Mackenna, S. and Dillon, J.M. (1991) The enneads. Abridged ed. London, England: Penguin.
Plumwood, V. (2002) Environmental culture: the ecological crisis of reason. London: Routledge. Available at: https://www.taylorfrancis.com/books/9780203996430.
Rudolph, K. and Wilson, R.McL. (1983) Gnosis: the nature and history of an ancient religion. Edinburgh: T. & T. Clark.
Runciman, S. (1947) The medieval Manichee: a study of the Christian dualist heresy. Cambridge: Cambridge University Press.
Segal, R.A. (2015) Myth: a very short introduction. Second edition. New York, NY: Oxford University Press.
Seyyed Hossein Nasr (2013) History of Islamic Philosophy (Routledge History of World Philosophies). Routledge; 1 edition. Available at: https://www.amazon.com/History-Islamic-Philosophy-Routledge-Philosophies-ebook/dp/B00GDC754S/ref=sr_1_1?keywords=hossein+nasr+leaman&qid=1557319577&s=books&sr=1-1-spell.
Starhawk (1999) The spiral dance: a rebirth of the ancient religion of the great goddess. 20th anniversary ed. San Francisco: Harper.
Stoyanov, Y. and Stoyanov, Y. (2000) The other God: dualist religions from antiquity to the Cathar heresy. New Haven: Yale University Press.
The Enneads (Classics) by Plotinus: 9780140445206 Paperback - WorldofBooks (no date). Available at: https://www.abebooks.co.uk/Enneads-Classics-Plotinus/30117751974/bd?cm_mmc=ggl-_-UK_Shopp_Trade-_-used-_-naa&gclid=Cj0KCQjwla7nBRDxARIsADll0kAUgjspdZ3Rg7rO2h26bv0dRoZfl91jNi3OXmXH8k_T3w38vxfXgvAaAqMoEALw_wcB.
