And I can't help but mention Isaac Asimov... When I was a kid hospitalized (medical issue... mental health didn't hit me until much later) I had trouble focusing in the hospital and therefore reading but someone got me a book of his short stories including Buy Jupiter and other stories, some of them were very short (one story was 1 and a half pages!) and I found them great to take my mind off of things and that's what got me reading science fiction.