Must be [**Alien Chronicles: The Golden One**](https://lucasfilm.fandom.com/wiki/The_Golden_One)
[![enter image description here][1]][1]
> Ampris thought her gladiator days were behind her until she discovered
> the truth behind the enslavement of the Aarouns under the
> Viis--causing her to take up arms against tyranny one final time.
> 
[**The Golden One**](https://tvtropes.org/pmwiki/pmwiki.php/Literature/AlienChronicles)
> A series of Sci-Fi books by Deborah Chester, published by Lucas Film,
> that tells the tale of how a single slave, Ampris, leads an uprising
> against the reptilian Viis, whose cruel empire is undergoing a
> Götterdämmerung, and becomes a legend. It read largely like a cross
> between the Book of Exodus and the story of Spartacus, the
> slave-gladiator who attempted to bring down the Roman Empire

Found in [reddit](https://www.reddit.com/r/printSF/comments/1apnj1/can_you_help_me_identify_this_1990s_sf_book_about/)


  [1]: https://i.sstatic.net/VlUB6.png