From alien oceans to collapsing empires, these five science-fiction books push world-building, scientific ideas and narrative scale far beyond familiar genre limits.
From Mars survival and cyberpunk androids to dystopian classics and galaxy-spanning empires, these are the 10 highest-ranked science-fiction books.
These ten hard science-fiction novels announce their scientific ambition early, pairing audacious ideas with gripping stories about humanity, identity and survival.