Originally Posted by SteveEisenberg
For the sake of libraries, I wish this was commonly true. But the question is worded so that if you vaguely recall buying one book twenty years ago, that's a yes.
Personally, there are two authors I can think of whose other book or books I bought after library reading -- Alex Dryden and Nury Vittachi. In both cases, it was because the authors wrote books only published outside the US, and thus almost impossible to get through libraries. I don't think this, or other rare situations, are going to give publishers the warm fuzzies.
Well, that's anecdata.
Voracious readers of genre fiction and fiction series do this all the time. I can't speak as much for other readers. I really cannot even quantify the number of authors' books I have bought after discovering the author at the library--the number is too high.