Name: The Ringworld Engineers
ISBN: 9780345418418

Larry Niven

"This rousing sequel to the classic Ringworld continues the adventures of Louis Wu and Speaker-to-Animals on that fantastic planet."--School Library Journal

The Ringworld Engineers

When Louis Wu returns to Ringworld as a captive of the Hindmost, he discovers the world is no longer stable, and he must locate the control center of the legendary engineers who first built the planet.

madi

Shane Segal

Sherry

Sarah Sammis

Claudiu

Chris Wilcox

Vladimir

Matthew Royal

Phil Halley

Rowan trollope 

Austin J Gotcher

Goktekin Dincerler

Scott Vandehey

Christian Witts

Joseph Aleo

Carlo Zottmann