More like 1636: Calabar's War

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The Leviathan TrilogySeries
series3 books2009
Steampunk, about genetic engineering, set in early 20th century.
“Set in an alternate First World War, Leviathan splits the belligerents into Clankers, who fight with mechanical walkers, and Darwinists, who fight with fabricated living creatures built from spliced DNA.”
from the catalogue
Start with Leviathan →
A Midsummer TempestNovel
Poul Andersonstandalone novel1974
Fantasy, set in british isles.
Moorcock's MultiverseUniverse
universe102 books1961
Set in secondary world.
“The Multiverse is not one world but an endless lattice of them, worlds folded within worlds, each a variation on the last — and through every one of them walks a single conscripted soul.”
from the catalogue
Start with Elric of Melniboné →
includes Oswald Bastable, Eternal Champion, Corum, Hawkmoon, Warrior of Mars, The Elric Saga
JanissariesSeries
series4 books1979
Military science fiction, about slavery, set in other star systems and far future.
“Janissaries are an American series of military and political-based science fiction novels are set in an interstellar confederation of races, in which humans are a slave race entrusted with military affairs and law enforcement.”
from the catalogue
Start with Janissaries →
A Transatlantic Tunnel, Hurrah!Novel
Harry Harrisonstandalone novel1972
Set in 19th century.
Eden (Harry Harrison)Series
series5 books1984
completed
About survival and aliens, set in prehistoric.
“Harry Harrison's Eden trilogy imagines an Earth where the dinosaurs never died out, evolving instead into the Yilane, a technologically advanced reptilian civilization that shares the planet uneasily with early humans.”
from the catalogue
Start with West of Eden →