The Time Ships

The Time Ships is a 1995 science fiction novel by Stephen Baxter. It is an authorized sequel to The Time Machine by H.G. Wells.

The story leaves off were the first had ended, with The Time Traveler using his time machine to travel back into the future to save Weena, but when he gets to the future, he finds out it is very different to when he left. The Morlocks are technologically and intellectually advanced, and have built a Dyson Sphere around the sun.