I really enjoy "A Psalm for the Wild-Built" by Becky Chambers.
It's a nice, serene escape to what could be.
What other books help you relax and maintain a positive outlook?
I really loved that book too. I then also read from the same author the book “a long travel to a small angry planet” and this was also pretty nice. Not as positive as the other one but still.
Edit: and of course the other book of the monk and robot series of Becky chambers