I usually don't read novellas, but reviews said you can't skip this one, and so I chose to read it. Besides, I've always liked Derek, since he was introduced in book one, and it was interesting to get his POV. I wouldn't mind if we get a spin off with him as a narrator. I never really cared about Julie, though, but maybe that will change. After all, I really didn't like Dani in the Fever series either at first, but I really came to love her character in Iced. So that might be the case with Julie, too. 
 The only thing I wan't keen on is that (view spoiler)[Julie and Curran were keeping things from Kate, even if it was a for a day, or a couple of days. (hide spoiler)]