Brian,
I thought that the new Send to Kindle functionality is available for all Vyrso resources from Publishers whose name starts with any letter from A to Y, unless the files are too big (which I assume is the case for the great resource https://vyrso.com/product/39348/holman-quicksource-guide-to-the-dead-sea-scrolls with its many pictures).
From another thread, a user is asking about https://vyrso.com/product/43819/after-acts-exploring-the-lives-and-legends-of-the-apostles (from Moody) and I see that https://vyrso.com/product/46339/voyage-with-the-vikings (from Focus on the Family) is not enabled for it, too.
Do they just require some work on your side to be made available for sending to the Kindle (don't bother too much with the Vikings then), or am I wrong in my first paragraph?
Thanks in advance for clearing this up,
Mick