well, THIS is cheery (really!)

 I'm delighted to have noticed the recent Amazon rankings for Fleet of Worlds (currently a Kindle promo at just $1.99).

#1 in Space Opera Science Fiction (Kindle Store)

#2 in Space Exploration Science Fiction eBooks

#2 in Hard Science Fiction (Kindle Store)

FoW, if you aren't familiar, is book one of an epic -- and completed! -- space-opera series, written in collaboration with Larry Niven.

If Ringworld or Known Space, Puppeteers or Kzinti, strikes a chord, you might want to check this out. See https://amzn.to/4756DJA