Sirius is Thomas Trelone’s great experiment – a huge, handsome dog with the brain and intelligence of a human being. Raised and educated in Trelone’s own family alongside Plaxy, his youngest daughter, Sirius is a truly remarkable and gifted creature. His relationship with the Trelones, particularly with Plaxy, is deep and close, and his inquiring mind ranges across the spectrum of human knowledge and experience. But Sirius isn’t human and the conflicts and inner turmoil that torture him cannot be resolved …
The tale recounts the visit to Earth of a giant being from a planet circling the distant star Sirius, and of his companion from the planet Saturn.
The ship rose on a column of invisible, super-heated steam ejected at incredible velocity. The spread of the blast flattened everything in the immediate vicinity. The surrounding town was wiped out. Immediately on blast off the automatic pilot engaged hi-drive to avoid the attacking missile. This put the ship into negative mass with relation to the normal universe. It was now in M-space. The ship was self-contained. It could keep going till all her occupants died of old age. But where to? Proxima Centauri? Or maybe Alpha Centauri, Riga, perhaps, or Sirius! The universe is a big space. They hurtled on through space and time until they saw the planet, a cloud-hidden ball, as it hung in space a hundred thousand miles below the orbiting vessel. It had seas and clouds, mountains and ice-caps, islands and continents, It had a moon and a yellow G-type sun. Home? Was this their second chance?
Over the long years, ships of the Interplanetary Confederation had scoured the empty wastes surrounding Sol, searching desperately for a sister planet; a companion for the isolated worlds of the Solar System. Of the ships that were sent out, many returned. But always the answer was the same. There were no planets! The worlds of Sol were alone in the Great Dark that swirled across the boundless heavens. It was not until Steve Rane and Nick Brodine, in the Exploratory Ship Vega, reached across the yawning gulf of light years to Sirius, that they found the strange planet that rotated in its complicated orbit around the twin sun. It was an event transcending all others. A discovery that plunged the planets of Sol into the greatest race of all time. For whoever controlled the alien planet, controlled the Solar System. And away from the watchful eye of the IPC it would be possible to build the greatest space armada in history and attack the Interplanetary Confederation without warning. To Steve Rane, the order came from Earth Central. Zero Point has been set for three months hence. The ship of Jupiter must not reach the new planet first.