I have  I. O. U. (Jenny Cain, Bk 7)

and was wondering if is necessary to read the whole series or if it is pretty much stand alone...  that one looked interesting but most of the others don't appeal to me.

I read them in order just because I always do but I don't remember that one enough to tell you if it stood on its own or not.  I did enjoy that series and like her writing in general  but I'm thinking you could probably read that one and then go back if you wanted.  IF you can stand to do that!  LOL. .

lol, I really prefer to read in order