Our universe is comprised of the several hundred billion stars just in our own galaxy, along with unknown billions of other galaxies, quasars, pulsars, and the like. Yet, despite all this, it is mostly empty space—the long, lonely interstellar distances, the nothingness of incredibly vast volumes of intergalactic spaces.The cavern universe is solid to that same incomprehensible proportion—being made of an invulnerable substance not existing elsewhere. Instead, of having hollow areas where stars and planets exist in our normal space/time, this universe has extensive networks of caves—endless caves. Despite the popular laybeing’s belief that these hypertunnels run straight between star systems, they instead meander all over the place. Many are those lost there forever.Because time and distance are much compacted in the endless caves, journeys of several light years are made in mere days.At certain places in these networks of hypercaves are interspacially weak points. Here one gains ingress and egress to and from our normal universe.And one should not attempt not an excursion into the endless caves on alone—find a good guide
The setting is an exotic one and the characters are fascinating in their own right. I loved the twists and turns and who was who. This includes one of the most amusing ship’s computers in SF literature. I hope Ralph Roberts continues his stories about the endless caves and his endearing characters.