Ringworld Engineers

Ringworld Engineers takes us back to the bizarre circular Ringworld to find it off kilter and nearing collision with its own sun. Louis Wu is back to try to prevent the calamity. Larry Niven quickly brings us back into this world and right into the action. Louis and his companions explore a bit more of the vast Ringworld, looking for the repair center to get the Ringworld back in the proper rotation. The action doesn't stop, and Niven keeps us rapt in the story. A fascinating read, especially for anyone who read the original.
Next up, I'm staying in sci-fi with Red Thunder by John Varley.