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I remember finding the book but never actually getting my hands on it. I'm looking for the title and author please.
By the power of truth, I, while living, have conquered the universe.
It wasn't a British authour, ir was Larry Niven who wrote Ringworld.
There's a lot drawn from Orson Scott Card's "Ender" series as well. Child soldiers, AI's as companions, and a genocidal Alien race much more technologically advanced than humans.