Found this on Twitter today. Absolutely essential knowledge for all of us approaching this point. This information mirrors much of what I learned the hard way when I published in the 1980s and 1990s: for example, that you never get the lump sum you think your advance is going to be. I am lucky in that I had reversion-of-rights language in my contracts (thanks, J and L) so that I have been able to self-publish my previously published books as ebooks. But it looks as if not everyone is so fortunate. In any case, this information is worth keeping up with: