If you were captivated by White Light's wild journey through mathematical landscapes and infinity—especially Felix Rayman's adventures in the realm of Cantor dust—then Permutation City is your next destination. Egan plunges you into a digital universe where consciousness, reality, and infinity are questioned at every turn. You'll find yourself pondering the nature of existence alongside characters who literally live in fractal worlds.

If you loved Rudy Rucker's playful and zany tone—like when Felix converses with mathematical abstractions or embarks on surreal, logic-defying escapades—you'll adore the offbeat wit of The Hitchhiker's Guide to the Galaxy. Arthur Dent's misadventures, the bizarre Vogons, and Marvin the Paranoid Android offer the same kind of clever, mind-bending, and hilarious fun.

If you were fascinated by how White Light brings abstract mathematical ideas to vivid, narrative life—like Felix's journey into higher dimensions—then Flatland is essential reading. You'll follow A. Square as he navigates a geometrical world, confronting strange dimensions and challenging the limits of perception, all through a mathematical lens.

Felix Rayman's trek into the infinite and the uncanny, where the rules of reality unravel, echoes in Neverwhere. Here, Richard Mayhew plunges into a fantastical underworld beneath London, where logic is skewed, dangers are strange, and nothing is quite as it seems. If you loved the surreal, unpredictable world-building in White Light, you'll be swept away by Gaiman's magical, dreamlike city.

If you enjoyed how White Light blurs the boundaries between reality and fiction, and how Felix's story folds back on itself in strange, metafictional ways, then Slaughterhouse-Five is a must. Billy Pilgrim's nonlinear odyssey through time, memory, and narrative trickery offers a similar playful, mind-bending experience.