If you were fascinated by Vannevar Morgan's relentless quest to build the space elevator in The Fountains of Paradise, you'll be equally gripped by the international team of scientists and engineers striving to terraform and colonize Mars in Red Mars. The book chronicles their technical challenges, political obstacles, and the sheer audacity of reshaping a planet, making it a perfect fit for fans of bold, goal-oriented science fiction.

If you appreciated the hard scientific detail behind the engineering marvels in The Fountains of Paradise, you'll find Permutation City a deeply engaging read. Egan dives into the frontiers of computer science, consciousness, and reality with the same rigor, following characters as they grapple with selfhood in digital worlds built from scientific principles.

If you were drawn to the epic, multi-generational vision of progress in The Fountains of Paradise, Aurora will captivate you with its chronicle of a generation ship's journey across the stars. Robinson explores not only the technical feats required for interstellar travel, but also the social, environmental, and philosophical challenges that emerge on such an immense scale.

If you loved the plausible, immersive setting of Clarke's Sri Lanka and his vision of the near future, you'll be enthralled by the world of Contact. Sagan brings to life the scientific community, the global political response, and the cultural implications of first contact with extraterrestrial intelligence, grounding it all in realistic detail.

If the philosophical undertones in The Fountains of Paradise—the contemplation of humanity’s place in the universe and the meaning of technological achievement—resonated with you, Solaris offers an even deeper dive. Lem’s novel confronts the limits of human understanding and the mysteries of consciousness through the haunting encounter with an utterly alien intelligence.