My Opinion: Older- I love the original cover. I think it's so pretty and much more intriguing. I also love the flowers! I think the new cover isn't very unique.
Glow by Amy Kathleen Ryan
My Opinion: Newer- I don't really like either cover too much, but I like how the letters have the girl inside them and the pink in the second one.
The Immortal Rules by Julie Kagawa
My Opinion: Older- I do not like the new cover for The Immortal Rules at all. It doesn't show anything about the book and I'd probably pass over it if I saw it a bookstore. I'm sad the paperback looks like that :(
Nightshade by Andrea Cremer
My Opinion: Older- I recently read Rift, and now I'm super interested in reading the Nightshade series. I love the shade of purple used in the older cover and I just think it's much prettier, in general.