What's the Name of That Book??? Discussions Mentioning Ringworld

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SOLVED. SciFi: Yam-induced super-senior-citizens [s] 4 31 Dec 03, 2009 05:57PM  
ABANDONED. SciFi Book Advanced Humans(Aliens?) Preserving Multiple Cultures 18 319 Jan 13, 2014 08:31PM  
SOLVED. Science fiction with Dyson shell-type world found by humans and aliens sharing tech--all spoilers [s] 7 128 Dec 13, 2012 07:30PM  
Genetic Engineering 10 124 Sep 05, 2013 07:06PM  
Let's play a game... 393 872 Jul 02, 2015 11:21AM  
Sci-Fi book where people explore an alien megastructure 12 988 Apr 22, 2022 08:46PM  
exploring other planets, NOT heavy on technical mumbo jumbo 7 26 Apr 07, 2017 06:00AM  
SOLVED. Sci fi short story series by one author set in a bar with the bartender as the MC includes aliens [s] 9 44 May 19, 2018 06:17PM  
Science Fiction depicting alien cultures/ancient worlds 32 426 Dec 01, 2018 11:31PM  
SOLVED. Adult Science Fiction. Space explorers/ scientists discover a planet that is shaped like a ring?! They find aliens who have blue feathers and are very tall. Read around 2013. [s] 17 325 Dec 23, 2020 12:41PM  
Adult Sci-Fi Fantasy book from 90s 4 64 Dec 15, 2020 08:22AM  
Exploring Empty Towns 20 1153 May 26, 2022 12:15AM  
Books with: generational spaceships, cryogenic sleep, lost in space 22 1021 Jun 15, 2024 04:54PM  
SOLVED. Adult Sci Fi, 1990-1997. "Ring(s)" in title: Man is awakened in body of a prisoner, earth now ruled by authoritarian gvt. He’s forced on mission through space, his only companion an onboard computer, to search for planets to terraform. [s] 7 35 Jun 02, 2022 01:12PM