SouthWings is included in a newly-released book, Climate Hope: On the Front Lines of the Fight Against Coal, by Ted Nace of CoalSwarm.

From Chapter 12 of Climate Hope:

"Of all the creative outreach that Appalachian activists were
developing, one of the most effective was the volunteer pilot
association Southwings, which took journalists, politicians,
celebrities, and benefactors on tours over mountaintop removal
sites. The flights and the films posted online by pilots provided
a far more revealing view of the devastation than could readily
be seen from roads and other locations accessible to the public.
Again and again, the flights had succeeded in transforming
lukewarm opponents—and at times even some mining
supporters—into advocates for banning the practice."