Sometimes your hard work pays off.
For me it happened when I received the following:
We are happy to inform you that
That Th!nk You Do: 60 Ways to Be Happy, Healthy&Hold off Harm
was selected for addition to the Library’s General Collections and was assigned Library of Congress control number: 2022362717.
Head, U.S. Special Acquisitions Section
I’d get a copy before all of Congress holds debates on it.