The 43 best moderately difficult books on religion and spirituality

No. 11 on this list. Gita Govinda · Jayadeva · 1200

Included in: UNESCO Collection of Representative Works

A required text in Sanskrit literature, Indian religious studies, and the history of dance, and part of daily ritual at the Jagannath temple in Puri.

No. 12 on this list. The Pilgrims Progress · John Bunyan · 1857

One of the most widely read books in the English language for over three centuries, second only to the Bible in many Protestant households. Standard reading in English literature courses worldwide, foundational text in studies of allegory, Puritan literature, and the English novel's origins. Available in over 200 languages, making it one of the most translated books in history.

No. 13 on this list. Paradise Regained · John Milton · 1671

Satan has fallen from Heaven, and Christ has been baptized in the Jordan. What comes next, in Milton's 1671 brief epic, is forty days in the wilderness and the most compressed philosophical argument in English verse. Satan does not simply offer bread and kingdoms. He offers Rome, with its full imperial apparatus; Athens, with its entire philosophical tradition from Socrates through Plato; and glory, defined in every form human ambition has devised. Christ refuses each in turn — not from weakness but from a clear-eyed account of what power, learning, and reputation are actually worth. The poem turns on a question Milton considered his career's central problem: what does true heroism look like, if it is not military conquest, political dominion, or classical education? His answer is patience, reason, and the rejection of everything Satan can plausibly offer. Written as a 'brief epic' in four books, Paradise Regained is spare where Paradise Lost is vast — no war in Heaven, no garden, no catastrophe. The drama is entirely verbal: two interlocutors debating the nature of kingship in a desert, one of them lying. The blank verse is the most concentrated Milton ever wrote. Each refusal Christ delivers is also a definition of the new heroism Milton believed the English Revolution had failed to produce.

No. 14 on this list. The Poetic Edda · Anonymous

The primary source for nearly everything modern readers know as 'Norse mythology,' taught across medieval studies, mythology, and world-literature curricula. No syllabus or Wikipedia data was returned for this record, but its status is comparable to Beloved or Infinite Jest in required-reading terms — a cornerstone rather than a periphery text.

No. 15 on this list. The Hero with a Thousand Faces · Joseph Campbell · 1949

Joseph Campbell opens with a Freudian reading of an Arapaho folktale and never looks back. A woman falls through a hole in the sky while digging up a buffalo plant. An Aztec prince descends into the underworld to retrieve the bones of the dead. A Polynesian hero is swallowed by a whale. Campbell lines up hundreds of these stories from six continents and argues they are all the same story: a hero ventures from the ordinary world into a region of supernatural wonder, wins a decisive victory, and returns transformed. He calls this the monomyth — departure, initiation, return — and maps each stage with taxonomic precision: the Call to Adventure, the Belly of the Whale, the Meeting with the Goddess, the Apotheosis. The comparative method is relentless. A Navaho vision quest illuminates the Buddha's meditation under the Bo Tree, which rhymes with Christ's temptation in the desert. Campbell reads all of it through Jung and Freud, treating gods as projections of the psyche and mythic journeys as metaphors for psychological maturation. The second half widens from the individual hero to the cosmos itself — creation, virgin birth, the dissolution of worlds. The prose is mid-century academic, formal but clear, carried by the momentum of one extraordinary story after another. Readers who want to know why myths from unrelated cultures keep telling the same story will find Campbell's answer here, built from the evidence itself.

No. 16 on this list. The Way of the Bodhisattva · Śāntideva · 2003

No syllabus or Wikipedia data came back in ReadingRate's own signals check, but this is one of the core texts of the Tibetan Geshe curriculum, studied continuously in Nalanda-tradition monastic colleges for over a millennium, and it anchors university Buddhist Studies and Asian philosophy courses worldwide through standard translations from Oxford World's Classics, Shambhala, and Snow Lion. Its canonical standing within the Buddhist tradition is comparable to a foundational scriptural commentary rather than a novel on a 'great books' list.

No. 17 on this list. The Courage to Be · Paul Tillich · 1952

The Courage to Be is one of the most widely assigned texts in university theology, philosophy of religion, and religious studies courses worldwide, and has been in continuous print since 1952. It is considered a foundational text in 20th-century existentialist theology and appears on syllabi across North America, Europe, and beyond. Its canonical status is secure within academic theology and philosophy of religion, though it does not occupy the same cross-disciplinary position as Butler's Gender Trouble or a major literary work.

No. 18 on this list. The Sacred and the Profane · Mircea Eliade · 1957

Mircea Eliade begins with a stone. Not every stone is sacred — only one that strikes homo religiosus as a revelation of something that transcends it. The stone is worshipped because it is sacred, not because it is a stone. From this deceptively simple distinction, The Sacred and the Profane constructs a full account of how religious man inhabits a different universe from his secular neighbor — a universe organized around sacred centers, inhabited by cyclical time that returns to origins, suffused with a nature that is never merely natural. Eliade moves through four dimensions of existence — space, time, nature, and human life — showing in each case how the religious experience transforms it structurally. A house is not just shelter but a cosmic axis, its hearth a link between earth, sky, and underworld. The New Year is not a calendar convention but an annihilation of used-up time and a return to the moment of creation. Water does not merely wash — it dissolves and regenerates. The examples accumulate from Babylonian ritual, Vedic cosmology, Australian Aboriginal Dreamtime, Polynesian creation myths, Greek hierogamy, and dozens of other traditions, all organized around the same underlying structures. The book's argument cuts quietly against secular modernity. Desacralized man, Eliade suggests, has not escaped religion — he has merely forgotten it, and pays for the forgetting with an existence unmoored from any cosmic center. Reading Eliade requires patience with theoretical vocabulary (hierophany, axis mundi, imago mundi) but rewards it with a framework that reorganizes how religious experience across all cultures coheres.

No. 19 on this list. Fasti · Ovid · 8

Fasti is a core text in Latin studies curricula and appears in most classical literature courses treating Augustan Rome, though it sits in the shadow of Ovid's Metamorphoses and Virgil's Aeneid in breadth of teaching. The Oxford World's Classics edition by Anne and Peter Wiseman (2011, revised 2013) marks its standing as a prestige canonical work. It is not among the most-taught Latin texts in translation courses but is standard reading for specialists.

No. 20 on this list. Confessions · Augustine of Hippo · 397

Augustine invented autobiography by turning inward: the stolen pears, the mistress dismissed, the child's voice chanting "take up and read" in a Milan garden. Sixteen centuries later, every memoir that excavates the self's interior life is still working the ground Augustine broke.

No. 21 on this list. Holy Bible: English Standard Version (ESV) · Anonymous

The Bible stands at the base of Western literature and religious education, and the ESV is one of the most widely used modern translations in churches and seminaries. The translation itself is less universal in secular curricula than the KJV.

No. 22 on this list. Holy Bible: New International Version · Anonymous

The Bible is the most widely read text in the Western tradition, and the NIV is among the best-selling modern translations. As a translation it sits within a definitive canon, though NIV itself is more a devotional standard than a literary one.

No. 23 on this list. The Book of Her Life · Teresa of Ávila · 1588

A standard text of Christian autobiography alongside Augustine, taught in religious-studies, women's-writing and Spanish literature courses.

No. 24 on this list. Errand into the Wilderness · Perry Miller · 1956

Errand into the Wilderness is a founding text of American Studies, assigned throughout graduate and undergraduate programs in American history, religion, and literature. It is not a syllabus fixture outside that field the way a canonical novel would be, but within it the book sits closer to required reading than supplementary.

No. 25 on this list. Prometheus Unbound · Percy Bysshe Shelley · 1820

Taught widely in Romanticism survey and graduate courses as Shelley's most ambitious work, though its length and difficulty keep it less anthologized in full than his shorter lyrics like 'Ozymandias' or 'Ode to the West Wind.'

No. 26 on this list. The Sandman · Neil Gaiman · 1989

The Sandman occupies a privileged position in the canon of graphic literature and appears regularly in university courses on comics studies, mythology in popular culture, and genre fiction. It is consistently cited on 'essential graphic novels' lists and is taught in courses on sequential art at major universities. Within its medium, its canonical status approaches that of Ulysses in prose — foundational, required — though graphic novel courses reach fewer syllabi overall than prose literature courses. The DB returned no syllabus data, but external sources confirm strong academic presence in comics and cultural studies contexts.

No. 27 on this list. Teaching a Stone to Talk · Annie Dillard · 1982

Annie Dillard goes to Mass and keeps imagining herself on a polar ice floe. This is the logic of the title essay 'An Expedition to the Pole,' which braids the disasters of Franklin, Scott, and Nansen with the small absurdities of Catholic liturgy—the singing group called Wildflowers, a baby named Oswaldo in blue tennis shoes, a priest whose knees crack like fine church music. The pivot is Dillard's actual question: why do churchgoers seem like cheerful tourists on a packaged tour of the Absolute? The Franklin expedition carried sterling silver flatware and a backgammon board into the Arctic and died. What are we carrying? The other essays are pitched at the same edge. 'Life on the Rocks: The Galápagos' opens with a sea lion resting its muzzle on Dillard's arm and ends with the continents riding their crustal plates like boys on dolphins. 'The Deer at Providencia' watches a deer die on a rope while Dillard eats lunch, then asks quietly what exactly surprises the men around her. Dillard writes as a natural historian trained by mystics: every fact about polar deaths or Darwin's finches is also an argument about what it means to be alive and failing to understand it. The reading experience is quiet, demanding, and luminous—a book that asks hard questions and refuses to answer them on your behalf.

No. 28 on this list. The Sandman Vol. 6: Fables & Reflections · Neil Gaiman

The Sandman series appears on university literature and cultural studies syllabi as a defining example of the graphic novel form, though the medium remains underrepresented in traditional English department canons. Vol. 6 is rarely isolated from the series, but as part of one of the most-collected graphic novel sequences in print history it holds a firm place in any serious reading of the form. No syllabus data was available in the database.

No. 29 on this list. Apologia Pro Vita Sua · John Henry Newman · 1864

Apologia Pro Vita Sua is a fixture of Victorian literature and religious-autobiography syllabi and is routinely anthologized as one of the great English spiritual autobiographies alongside Augustine's Confessions and Bunyan's Grace Abounding. It has stayed continuously in print since 1864 in editions from Oxford World's Classics and Everyman's Library.

No. 30 on this list. The Varieties of Religious Experience · William James · 1902

William James delivered these twenty lectures at the University of Edinburgh in 1901 and 1902 with a declared method: study religion not through theology or institutional history, but through the private testimony of individuals who have felt it acutely. He wanted the raw material—George Fox walking barefoot through Lichfield in winter, crying 'Wo to the bloody city!'; Saint Teresa's account of her visions; anonymous correspondents describing the sudden loss of a felt connection to something larger than themselves. The organizing argument is a defense of religious experience against what James calls medical materialism—the habit of dismissing mystical states by pointing to their neurological origins, as though epilepsy explained Saint Paul's vision on the Damascus road. James counters that all mental states, including scientific ones, have organic causes; the question of value must be answered on different grounds. His criterion: by their fruits, not their roots. The book maps varieties of religious consciousness—the healthy-minded who see goodness everywhere, the sick souls who cannot; conversion as psychological transformation; the mystical state as a genus with recognizable features across traditions. James treats Buddhist, Christian, Stoic, and New Thought testimonies as data points in the same inquiry. The prose is formal Victorian academic English, long-sentenced and densely qualified, but James keeps pulling back toward concrete cases. This is philosophy that takes human experience seriously enough to quote it at length.