If you were captivated by the immense scale of Eon, you'll be drawn into Revelation Space. Reynolds builds a cosmos where ancient alien mysteries, sprawling human factions, and centuries-long plots collide. The story weaves together the journeys of Dan Sylveste, Ilia Volyova, and Ana Khouri, whose seemingly disparate missions converge in a far-future galaxy filled with enigmatic artifacts and existential threats.

If you loved the rich, imaginative worldbuilding of Eon—from the Stone's cavernous chambers to the mysterious Thistledown—The Algebraist will enthrall you. Banks immerses you in a universe where gas-giant-dwelling Dwellers, complex political hierarchies, and ancient secrets shape the fate of all. Fassin Taak's quest among the Dwellers echoes the sense of discovery and wonder that made Eon so memorable.

If Eon’s attention to scientific authenticity and exploration of advanced technology resonated with you, Red Mars will be a perfect fit. Robinson meticulously details the terraforming of Mars, delving into the politics, environmental science, and human ingenuity required for such an endeavor. The novel’s focus on realistic science and the challenges of colonization mirror the hard SF elements you enjoyed in Eon.

If you appreciated following multiple characters—like Patricia Vasquez, Mirsky, and Lanier—each with their own crucial roles in Eon, you'll find Pandora's Star equally compelling. Hamilton orchestrates a vast, interconnected ensemble fighting to understand a galactic threat, with each perspective offering new insights and twists as the story unfolds.

If you found the philosophical questions about society, ethics, and the nature of progress in Eon thought-provoking, The Dispossessed will deeply reward you. Le Guin’s narrative follows Shevek, a physicist challenging the boundaries of two contrasting worlds, and grapples with utopian ideals, personal freedom, and the cost of scientific discovery, much like the big ideas that permeate Bear's novel.