Mark Yashar's Profile > Mark's Groups

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

Fans of Arthur C. Clarke
103 members — last activity Jun 01, 2019 11:56AM
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Hard SF
1213 members — last activity Oct 15, 2026 12:28AM
Mark's comments (1)

Goodreads Authors/Readers
57901 members — last activity 1 hour, 53 min ago
Mark's comments (0)

The Evolution of Science Fiction
1950 members — last activity Oct 16, 2026 08:16AM
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currently reading

Sci-fi and Heroic Fantasy
9000 members — last activity 8 hours, 39 min ago
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Science and Inquiry
4563 members — last activity 14 hours, 21 min ago
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currently reading

Science and Natural History
1138 members — last activity Sep 16, 2026 09:37AM
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Astronomy and Space exploration
308 members — last activity Sep 20, 2026 01:47AM
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Upcoming Bookclub Reads

Nov 01 in Science and Inquiry view »

Nov 01 in The Evolution of Science Fiction view »