@Unkownpersona45 Hi, so I read your books, for the Oneshots, I'd recommend adding more interaction. For Belle's story add what happened in the library as they were putting the books away, if they went for coffee afterwards etc. For Emma's story, perfect start again add more, possibly a conversation on the way home or the person's mother's reaction to seeing Emma. Both are good but they ended abruptly and left me wondering what happened next.
For your The Little Things book, it's good, I enjoyed the chapters and it's easy to tell whether it's a scene in Enchanted Forest or Storybrooke. It made me want to continue reading which is the main thing. You've got an amazing storyline and again, made me wonder what's next. So, my suggestions for what you could add, how Iris and Killian fell in love in the Enchanted Forest, Iris helping Emma in Storybrooke and then how she'll react when Killian is harmed by the car. I don't have many suggestions as it's a good start with a strong possible plot.
For Jealousy, Jealousy, unfortunately, I can't say much as there's only one chapter, I'd suggest a name change for the character since it's the same name as The Little Things book and it was a little confusing. It's a good start, but I don't have much suggestions since there's not much written about the character for me to think what kind of situations Iris would be involved in.
Hope all that helped :)