Using BookBubs can reveal some hidden indie gems... and as I'm a member of Renaissance Next I also know a few more to put in the list anyway. 
- Patty Jansen: Sci-fi, though also does fantasy.
- J R Lallo: Mostly for his Big Sigma series but also does other stuff.
- Christopher Nuttall: Currently reading his Schooled in Magic series.
- @RJDiogenes has some awesome short story/poetry collections.
- @blablover5 : Dwarves In Space!
- Jesse Schulz: Mega-length historical/fantasy/SF... not sure how to describe his stuff actually. It's just awesome.
Non-indies:
- Terry Pratchett (duh): Fantasy
- @Kirsten Beyer (again duh): Sci-fi
- @KRAD (again duh): Sci-fi/fantasy (excluding tie-in I particularly like his Cassie Zhukav and Dragon Precinct series)
- LA Gilman: Fantasy
- Jasper Fforde: Fantasy/comedy
And many more...

- Patty Jansen: Sci-fi, though also does fantasy.
- J R Lallo: Mostly for his Big Sigma series but also does other stuff.
- Christopher Nuttall: Currently reading his Schooled in Magic series.
- @RJDiogenes has some awesome short story/poetry collections.
- @blablover5 : Dwarves In Space!
- Jesse Schulz: Mega-length historical/fantasy/SF... not sure how to describe his stuff actually. It's just awesome.
Non-indies:
- Terry Pratchett (duh): Fantasy
- @Kirsten Beyer (again duh): Sci-fi
- @KRAD (again duh): Sci-fi/fantasy (excluding tie-in I particularly like his Cassie Zhukav and Dragon Precinct series)
- LA Gilman: Fantasy
- Jasper Fforde: Fantasy/comedy
And many more...

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