No. 18 was All Unquiet Things by Anna Jarzab.
Someone, presumably a teenager girl, returned this to the book drop at the THS library. Instead of shelving it, I checked it out under my own name and brought it home. Another teen romance - with a murder-mystery twist!
It was written in first person, but alternating between two main characters. I liked how the back story and mystery unfolded from the two perspectives, back and forth, back and forth. Time also jumped backward and forward. Interesting style.
And a good twist is always appreciated :)