If you were captivated by the wild, overgrown jungles and the mutated flora and fauna in Hothouse, you'll be drawn to The Drowned World. Ballard crafts a haunting vision of a future Earth submerged by tropical lagoons and primeval forests, where Dr. Robert Kerans navigates both a surreal landscape and the psychological transformation it induces. The novel's immersive worldbuilding and evocative descriptions will transport you into an alien, yet eerily plausible, future.

If you found Gren's journey across a hostile, ever-changing environment compelling in Hothouse, you'll appreciate the odyssey of Lauren Olamina in Parable of the Sower. As society collapses around her, Lauren must navigate danger, forge new alliances, and grow as a leader. Butler's tale weaves together survival, adaptation, and personal evolution in a world shaped by environmental catastrophe.

If you were fascinated by the strange symbiosis between humans and the mutated ecosystem in Hothouse, Annihilation will immerse you in the mysteries of Area X—a region where nature has taken on bizarre, often unsettling forms. Follow the biologist's expedition as she confronts both the alien landscape and the limits of her own understanding in a story where the environment is as much a character as any human.

If the sense of wonder and danger in exploring mutated ecosystems and interacting with non-human forces in Hothouse appealed to you, Roadside Picnic offers a similarly unsettling experience. Stalker Redrick navigates the Zone, a landscape littered with alien artifacts and strange physics, where survival requires both cunning and adaptability. The novel's blend of mysterious alien influence and human struggle will keep you enthralled.

If you enjoyed the philosophical undertones of adaptation, identity, and the limits of human understanding in Hothouse, you'll find Solaris equally thought-provoking. Psychologist Kris Kelvin arrives at a space station orbiting the sentient ocean planet Solaris, where the alien mind challenges every preconception about communication and reality. Lem’s meditative narrative will resonate with readers who appreciate science fiction as a vehicle for existential exploration.