If you were fascinated by the deep questions about good, evil, and the soul's fate in That Hideous Strength, you'll be drawn into The Left Hand of Darkness. Le Guin’s novel explores gender, loyalty, and the meaning of humanity through the journey of Genly Ai on the frozen world of Gethen. The book’s meditative pace and thoughtful dialogue invite you to reflect on identity and morality in a way that echoes Lewis’s profound philosophical themes.

If the shadowy organizations, academic intrigue, and tangled conspiracies of the N.I.C.E. in That Hideous Strength kept you turning pages, you'll revel in the labyrinthine plot of Foucault's Pendulum. Eco’s novel plunges you into a world of secret cabals and esoteric mysteries, following three editors who become ensnared in their own invented conspiracy—blurring the lines between reality and paranoia.

If you admired the intricate world of academia and myth in That Hideous Strength, Jonathan Strange & Mr Norrell offers a similarly immersive experience. Clarke’s novel brings Regency England alive with secret societies, ancient magic, and the struggle for power between two very different magicians. The book’s lushly crafted setting and complex magical lore will draw you in just as Lewis’s careful worldbuilding did.

If you were intrigued by the group dynamics, shifting alliances, and moral ambiguity among Mark, Jane, and the other characters in That Hideous Strength, The Secret History will grip you. Tartt’s novel follows a tight-knit group of classics students at an elite college as they slide from intellectual curiosity into transgression, exploring how ordinary people are drawn into extraordinary acts.

If you appreciated the allegorical battles between good and evil and the symbolic resonance of Merlin and the eldils in That Hideous Strength, you’ll be mesmerized by The Book of the New Sun: Shadow & Claw. Wolfe’s narrative weaves myth, religion, and symbolism into a dense, rewarding tapestry, challenging you to decode its mysteries alongside the enigmatic Severian.