The War of the Grandfathers by Murray Leinster is an exciting science fiction novel that tells the story of mysterious events that take place on a planet where great battles have taken place between different races of grandfathers. The main character, a young scientist, captured by one of the parties to the conflict, finds himself in the middle of a hellish war and is forced to make a choice between loyalty to his principles and survival. An exciting plot, unexpected turns of events and philosophical reflections on the nature of war make this book unforgettable for every lover of science fiction.