Jonas (Cuatro Almas, #1)
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I loved the premise of dead people having some unfinished business that they have to solve (the events surrounding their deaths). The only thing I found a bit weird is Hunter's time as an undead. All the other "ghosts" only have one year to be part of the world of the living. Hunter, however, has spent a lot more time than that there.
This is the kind of book to read when you have exams. Interesting plot, but not overly complicated, and you can cover a lot of ground in a short time. Not recommended for long plane/train/car trips though, unless you take the whole series with you.
Longer review soon.