The author neglects to mention if he every visited any independent bookstores. I have fond memories of buying very unique books on topics from art to philosophy from such stores, stuff that you would never find in Barnes & Noble (or borders) and only occasionally on Amazon if you know exactly what to look for first.
I'm the author. I browse independent bookstores whenever I can. I agree that you can find interesting things there that you'll never find in large chains. But I don't recall seeing much by Le Guin in any bookstore, new or used, small or large.
I don't know how many times I've tried to find something slightly off the beaten path in a local bookstore or library only to come home and order it online.
On the other hand, local bookstores were more interesting before Amazon came along. Amazon doesn't just sell bestsellers, far from it, but they've caused local stores to rely more on bestsellers. All my favorite bookstores have shriveled their selection to the point that they're hardly worth visiting anymore.