The Fault in Our Stars
Sorry, but didn't think it was that great.
Elixir
Don't bother. Lazy writing, boring story.
Wings
This was okay. Interesting to the extent that she was a different supernatural being (a faerie/plant) but in the end... being a faerie/plant is kind of boring to read about. Highly doubt I'll read any more of this series.
Cinder
Interesting take on the age-old Cinderella story. I enjoyed it and am looking forward to the next book in the series!