I've seen the movie a few times and really enjoyed it, so I thought when I got a chance to get the book that it'd be great to see the differences and enjoy a more fleshed out story. After all, the book is always better and lots of people have said they didn't like the movie because the book was better. 
 Eh... I... like the movie better. 
 Honestly, I wish I would have read the book before the movie because the book just felt boring compared to the movie. It didn't really feel like a fantasy adventure like the movie did. It plodded along and ended with a fizzle. I got to the end was like 'Is that it?' It felt unsatisfying. But I'm not sure it's solely because I saw the movie first. I loved both the movie and book Warm Bodies. I saw Harry Potter before reading the series. I dunno, maybe the changes were too stark in this case.