this book has been a disappointment. i mean, it's not bad, but after watching the tv series i was expecting something else. 
 i usually don't mind if to adapt a book the screenwriters need to change or merge characters, situations, places. but what the screenwriters made with the 100 was clearly improving the original. 
 i was expecting to read a story about survival and the hard choices one needs to do in order to achieve that, but what i found instead was a bunch of teenagers with too many hormones for their own good that only care about themselves, even if they spent the whole book swearing they do whatever they do to protect someone else. seriously. the relationships and the love stories were more important than the survival which it made no sense with the situation at hand. and the flashbacks were mostly anticlimactic, especially in the final chapters. 
 the only characters that made sense to me was bellamy (although he is supposed to be 20, but acts like 16 sometimes) and clarke. i didn't understand wells. i think he expected clarke to fall at his feet for joining the 100 voluntarily like "look girl what i did for you", huh? and glass? what is this girl doing in the story? why did i have to read about her? her parts were dull and boring and tedious. she was a pointless character. 
 in conclusion, i like the tv series much better than the book, although the book is not so bad, it has a good idea behind... i still don't know, but i might read the second book in september if i feel like doing it.