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Michael
https://www.goodreads.com/petrifis
Building a SciFi/Fantasy Library
— 3663 members
— last activity Nov 01, 2025 06:20AM
Add your science-fiction or fantasy books to the list, but make sure it's not already there. . .no need for duplicate entries. ...more
Alternate History
— 313 members
— last activity Sep 08, 2025 11:08AM
This group is for those fans of authors such as S.M. Stirling, Harry Turtledove and others who provide us with fascinating "What-If" scenarios in the ...more
The Brain and Mind
— 4396 members
— last activity Sep 25, 2025 01:42AM
This is a group for readers to recommend and discuss books related to real and/or artificial brains. Categories include but are not limited to: neuros ...more
Science and Inquiry
— 4459 members
— last activity Dec 29, 2025 05:57PM
This Group explores scientific topics. We have an active monthly book club, as well as discussions on a variety of topics including science in the new ...more
Mathematics&Philosophy&Astronomy
— 337 members
— last activity Oct 04, 2013 05:44PM
you can touch the world, join us. there are a lot of things to know! it doesn't need to be very good at Mathematics,Astronomy,philosophy,... . every ...more
Michael’s 2025 Year in Books
Take a look at Michael’s Year in Books, including some fun facts about their reading.
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