This repository of resources for spirituality, organized as a directory, with categories and tags, lists the highest quality suggestions and ratings for your research and experience about spirituality. You can find everything on Google, but you also know how difficult finding high quality materials is. Even on academic texts that you can find, for example, on Google Scholar, JSTOR or ResearchGate, there is a lot of confusion about what spirituality is. The selection of resources and the quality ratings that you can find on Spiritual Study consider these aspects.
Seymour-Smith Martin, (1998)
Bloom Harold, (1994)