We might think of fictions as extended thought experiments: What might it be like if...? Ordinary fiction confines itself to hypotheticals in the ordinary run of human affairs (though sometimes momentous, exotic, or exaggerated). In contrast, speculative fiction considers remoter hypotheticals. Although much speculative fiction considers hypotheticals of future technology (and thus is science fiction), speculative fiction also includes fantasy, horror, alternative history, and utopia/dystopia. (The abbreviation "SF" can be read either as meaning science fiction specifically or speculative fiction more broadly.)
Speculative fiction is often of philosophical interest: SF writers think through some of the same hypotheticals that philosophers do -- for example about personal identity, artificial intelligence, and possible future societies. Good SF writers think through these hypotheticals with considerable insight. I would like to see more interaction between philosophers and SF writers.
Since 2014, I have been collecting professional philosophers' recommendations of "personal favorite" works of philosophically-interesting science fiction or speculative fiction. Each contributor has given me a list of 10 works, each with brief "pitch" pointing toward the work's philosophical interest. So far, I have 48 sets of recommendations -- almost five hundred recommendations total!
Since the master list is huge, I have organized it in two ways: by contributor and by author recommended. The by-contributor list consists of each list of ten works, in alphabetical order by contributor. The by-author list lists the authors (or movie directors) in order of how frequently their work was recommended. For example, the single most recommended author was Ursula K. Le Guin. The list begins with her, gathering together the Le Guin recommendations from all of the contributors. Next come Ted Chiang and Philip K. Dick, so that you can see what work of theirs has been recommended and why; then Greg Egan, then... well, I don't want to spoil your surprise!
* Stable URL for both Master Lists and other "Philosophical SF" project links.
Below are the three most recent sets of recommendations.