I picked up Between The Lines because I really enjoyed Easy by the same author. This book, not as much. I didn't think it was bad and I do want to see "School Pride" (I think that was the name of the movie) since I love Pride & Prejudice. But the characters were all a bit too much on the ansty/annoying side for me.
I did go in to it also thinking it would be tied up at the end, though I knew it was a series. When I reached the end and realized pretty much nothing was resolved I also realized I didn't really care what happened next. So I will not be continuing the series.