I suppose it is not about coincidence but more about consequences about how some little thing you do might somehow affect someone else's life without you even knowing about it.
It's and easy read.
Then, of course, there is Zen and the Art of Motorcycle Maintenance. A very hard read, but the best advice is in the very first chapter
"Before beginning any project, one must first have peace of mind"
Sheesh, now I'm a librarian ..........
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