C.S. Lewis

C.S. Lewis was a British novelist, theologian, and literary critic whose Narnia chronicles and works of Christian apologetics have made him one of the most widely read authors of the twentieth century.

C.S. Lewis spent most of his professional life as a Fellow and Tutor at Magdalen College, Oxford, and later as Professor of Medieval and Renaissance Literature at Cambridge. He was a close friend of J.R.R. Tolkien and a central member of the Inklings, the informal Oxford literary group that shaped some of the twentieth century’s most enduring fantasy literature. Lewis’s intellectual range was extraordinary: he wrote works of literary scholarship, Christian apologetics, science fiction, allegory, and children’s fantasy — and did each of them well enough to be remembered for it.

The Chronicles of Narnia, seven novels published between 1950 and 1956, are the books for which Lewis is most widely loved. They are ostensibly children’s fantasies about a magical world entered through a wardrobe, but they are also theological arguments, moral fables, and meditations on faith, death, and the nature of reality. Lewis never talked down to children, and the Narnia books reward adult re-reading as generously as any novel written for grown-ups: the later books especially — The Silver Chair, The Magician’s Nephew, The Last Battle — carry a weight of theological seriousness that sits alongside the adventure without diminishing it.

The Screwtape Letters (1942) is a different kind of achievement: a work of Christian apologetics in the form of a satirical novel, in which a senior demon advises his nephew on the techniques of spiritual corruption. The formal inversion — vice presented from the perspective of vice — gives Lewis a freedom that no straightforward argument could provide. It is one of the cleverest books of the twentieth century, and one of the most unsettling. Lewis converted to Christianity in his early thirties and never wrote about it drily: his faith was hard-won and hard-held, and it shows in everything he wrote.

A Writer of Many Worlds

C. S. Lewis was one of the most influential and beloved writers of the twentieth century, a figure of remarkable versatility whose work spans children’s fantasy, science fiction, literary scholarship, and Christian apologetics. Best known today as the creator of the Chronicles of Narnia, Lewis was also one of the most widely read Christian writers of his era and a distinguished scholar of medieval and Renaissance literature at Oxford and Cambridge. His extraordinary range, his clarity of thought, and his gift for making complex ideas accessible and vivid have given his work an enduring and far-reaching influence across many fields.

The Chronicles of Narnia

Lewis’s most famous achievement is the Chronicles of Narnia, the seven-book series of children’s fantasies that has enchanted generations of readers since the appearance of The Lion, the Witch and the Wardrobe. Set in the magical land of Narnia, where children pass through a wardrobe into a world of talking animals, mythical creatures, and the noble lion Aslan, the books combine thrilling adventure with deep moral and spiritual resonance. Beloved for their imaginative richness and their warmth, the Narnia books have become classics of children’s literature and the cornerstone of Lewis’s popular reputation.

Faith and Allegory

A defining feature of much of Lewis’s fiction is its engagement with Christian themes, often through allegory and symbol. The Narnia stories, in particular, are infused with Christian meaning, with the figure of Aslan embodying ideas of sacrifice, redemption, and resurrection, though Lewis preferred to call this “supposal” rather than strict allegory. Readers of all beliefs have loved the books as adventures, while many have also found in them a powerful imaginative vehicle for spiritual ideas. This fusion of story and meaning is central to the distinctive character of his fiction.

A Christian Apologist

Beyond his fiction, Lewis was one of the most influential Christian apologists of the twentieth century, whose works of popular theology have been read by millions. Books such as Mere Christianity, The Screwtape Letters, and The Problem of Pain present and defend Christian belief with clarity, wit, and rigorous argument, making sophisticated theological ideas accessible to ordinary readers. Whatever one’s own convictions, Lewis’s skill at lucid, persuasive, and imaginative exposition is widely admired, and these works remain enormously influential within Christian thought and beyond.

A Scholar and Thinker

Lewis was a serious academic whose scholarly work on medieval and Renaissance literature, including the influential study The Allegory of Love, earned him a distinguished reputation in his field. His deep learning informed all his writing, lending even his popular work an intellectual substance and historical richness. A member, with his friend J. R. R. Tolkien, of the Oxford literary circle known as the Inklings, Lewis was at the centre of a remarkable community of imaginative and intellectual writers, and his scholarship and his creative work nourished one another throughout his career.

Imagination and Reason

What unites Lewis’s diverse output is his conviction that imagination and reason are allies rather than opposites, and his rare ability to appeal to both. He could construct a rigorous argument and tell an enchanting story with equal skill, and he believed that fiction and myth could convey truth in ways that argument alone could not. This integration of the rational and the imaginative, the scholarly and the popular, the playful and the profound, is the hallmark of his sensibility and a key to his lasting and unusually broad appeal.

Where to Begin with C.S. Lewis

C. S. Lewis’s influence is extraordinary in its range, extending across children’s literature, fantasy, popular theology, and literary scholarship, and his books continue to be read and cherished around the world. For newcomers, The Lion, the Witch and the Wardrobe is the natural gateway to Narnia, while The Screwtape Letters and Mere Christianity offer accessible introductions to his nonfiction. For readers seeking imaginative, intelligent, and deeply humane writing that bridges story and idea, Lewis remains one of the most rewarding and enduringly beloved authors of the modern age.

Reading Guides

• Where to Start with C.S. Lewis