Serafinas

There are a couple of books about a gal named Serafina.  The one I read for work was Serafina and the Black Cloak.  It's the first in a series.  There's also a Dragon Born Serafina.  I didn't read any in that series.  And then there is this Serafina.  And I haven't read any of those.
For a few years now I have been told by friends, "Have you read Serafina? It is so good!  You have to read it!" and these friends are friends who read YA and Children's lit and so now I have no idea if they meant any of these Serafinas or another Serafina altogether. 
All I can say is, I really liked Serafina and the Black Cloak.  I loved the Vanderbilt stuff, I loved the animal stuff, I loved the whole temptation of the Black Cloak and the question that Serafina asked herself.  She was wondering if she was "good" or "bad" and did the "bad" people even know that they were doing bad things, did all "bad" people think they were doing "good."
Anyway, I will read the next one!