The Ringworld Engineers Author:Larry Niven Del Rey (c) 1980 — Publication date March 1981 — It's been 20 years since the quixotic and worldsweary Louis Wu discovered the Ringworld. Now he and Speaker-To-Animals are going back, captives of The Hindmost, a deposed puppeteer leader. With Louis' help, it intend to regain its status by bringing back such extraordinary treasures from the Ringwor... more »ld that its fellows will have to be impressed. But when they arrive, Louis discovers that the Ringworld is no longer stable... and will destroy itself within months. To survive, he must locate the control center of the legendary engineers who built the planet. His quest becomes a wild and gripping venture, blending with mysteries and spectacular technologies that only Niven can conjure!« less