Karl Sabbagh is a British writer, journalist, television producer, and convicted sex offender. His work is mainly non-fiction: he has written books about historical events and produced documentaries for both British and American broadcasters.
Karl Schlögel is a noted German historian of Eastern Europe who specialises in modern Russia, the history of Stalinism, the Russian diaspora and dissident movements, Eastern European cultural history and theoretical problems of historical narration.
Karl Schroeder is a Canadian science fiction author and a professional futurist. His novels present far-future speculations on topics such as nanotechnology, terraforming, augmented reality, and interstellar travel, and are deeply philosophical. More recently he also focuses on near-future topics. Several of his short stories feature the character Gennady Malianov.