I got an update from Bryan Garner today on the status of his appeal to editors and writers ’round the world to buy the new edition of Garner’s Modern American Usage.
Here’s what he has to say:

Thanks for your response! The appeal succeeded in taking GMAU3 from #4,000 on Amazon.com to a high of #280. It was #1 in dictionaries for a time, and #3 in editing resources. And the book received a good deal of positive attention as a result. Many thanks for your support. Now what the major chains will do is perhaps still a ticklish matter . . .

Good luck, Bryan! We’ll continue to buy the book direct from Oxford if needed . . . but here’s hoping that Amazon continues to carry it as a result of this grassroots push.