It is the second part of Reynolds' future history Poseidon's Children trilogy, following his 2012 novel Blue Remembered Earth.
Earth | NYPD Blue | Toronto Blue Jays | Earth-616 | Google Earth | Blue Peter | Earth Day | Blue | Blue Ridge Mountains | Friends of the Earth | From the Earth to the Moon | Cursed Earth | Blue Öyster Cult | Blue Note Records | Earth, Wind & Fire | Middle-earth | Blue Heelers | Pokémon Red and Blue | Winnipeg Blue Bombers | Blue Nile | From the Earth to the Moon (miniseries) | Manfred Mann's Earth Band | Blue's Clues | The Day the Earth Stood Still | ''Pokémon Red'' and ''Blue'' | Earth: Final Conflict | Blue Man Group | Vida Blue | The Blue Danube | Rhapsody in Blue |