(aka: A Clash of Cymbals)
A Clash of Cymbals (published in the US as The Triumph of Time) (1959) follows the passage of Amalfi and the 'New Earth' planet undertaking the first ever inter-galactic transit. In the less relativistically-distorted space between the two galaxies evidence of a collision between two universes is detected, a matter-anti-matter collision which reveals the cyclic nature of reality. An alien culture is also investigating this phenomenon, which will shortly accelerate to engulf all galactic space, in other words, the universe will end in a big crunch/big bang. It will be possible to modify the future development of the universes which will emerge from this singularity, and Amalfi directs the 'New Earth' residents to compete with the alien culture (the Web of Hercules) in order to prevent their manipulation of the future of the universe.