u/FavoriteCrayon

I just finished Dire Bound a few days ago and was patiently waiting for Fury Bound which I know released today. Kindle Unlimited is how I read with it, and I know that a lot of romantasy series would consistently have all books of the series in KU as well. I'm still fairly new to joining the reading world, so I'm not too familiar with KU. Does anyone know if it's normal for Fury Bound to not be KU if Dire Bound is? Is it because it's a newly released book? If that's the case, I'd wish Amazon would at least give a date as to when it could be available for KU users instead of putting a $14 purchase button.