Mark Yashar's Profile > Mark's Groups

Groups Mark is a member of Showing 1-8 of 8

Fans of Arthur C. Clarke
104 members — last activity Jun 01, 2019 11:56AM
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Hard SF
1207 members — last activity 12 hours, 5 min ago
Mark's comments (1)

Goodreads Authors/Readers
57105 members — last activity 10 minutes ago
Mark's comments (0)

The Evolution of Science Fiction
1917 members — last activity Jul 09, 2026 09:21PM
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currently reading

Sci-fi and Heroic Fantasy
8897 members — last activity 12 hours, 1 min ago
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Science and Inquiry
4528 members — last activity Jul 10, 2026 11:50PM
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currently reading

Science and Natural History
1137 members — last activity Sep 22, 2020 01:21PM
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Astronomy and Space exploration
299 members — last activity Jun 24, 2026 07:00AM
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Upcoming Bookclub Reads

Aug 01 in Science and Inquiry view »

Aug 01 in The Evolution of Science Fiction view »

Sep 01 in The Evolution of Science Fiction view »