This is a very little followed, useful twitter account.
https://twitter.com/WHPublicPool
2 separate tweets about helicopter practice landings today.
Here's a direct link to the pdf download. Looks like an interesting read. I'm downloading everything I can that looks interdasting in the event of a "no internet" darkness/blackout IF it take that form–gathering a body of work adequate to pass some time.
https://ia802703.us.archive.org/31/items/pdfy-hH7b-2yjyACdh8nO/The%20Curse%20Of%20Canaan%20%5BA%20Demonology%20Of%20History%5D.pdf