by Carl Sagan, 1985.
I put this into my library queue as it's highly regarded in some parts, and I'd never read it. But at about chapter 2, I started to realize that I actually have read it, maybe thirty years ago. Not only that, but I'm pretty sure I actually have a copy somewhere on the shelves here at home. I'm going senile.
Oh well, at least it's the sort of senile that gives me quick, pleasant things to read.
Also this month: The Long Way to a Small, Angry Planet by Becky Chambers. Once again, I wanted to like this so much. I started reading it twice, spaced about 18 months apart. But each time, I just couldn't get into it, and abandoned it about 1/3 in. It is indubitably me, not you.