Hey there,
I think it's kind of sad that there isn't much talk on here about the super cool novel-verse that Trek has, let alone the fan fiction community!
Maybe this could be a starter thread for people recommending their favorite licensed or unlicensed works of Trek fiction, together with like a sentence to sell people on it! There's so many points of the Star Trek universe that only novels, comics or even fan fiction explore, and as someone who loves writing plausible fiction about underexplored areas of the universe (like ancient Bajoran history or the day-to-day of an Earth citizen) I wish more people would engage with it.
GO
I really enjoyed the ENT novels covering the Romulan awar and the standalone Khan novels detailing Gary Seven dealing with the original eugenics wars in the 90s.