All the Bright Places is a young adult book about: 
 - dealing with loss of a family member; 
 - dealing with depression and other mental disorders; 
 - the importance of remaining kind and humane even to those people who you don't necessarily like or want to be friends with. 
 Violet is a girl whose sister died in a car crash. She has lost interest in everything that she'd liked doing before (writing, hanging out with friends, school). She meets Theodore - a weirdo ("freak") that doesn't get along with anyone, thinks about suicide all the time, he's abused by his father and generally neglected by his family. It's a story about these two lonely people meeting on the ledge of a bell tower both wanting to jump, but both changing their minds and deciding to try and live with the pain they feel. 
 The novel is very easy-to-read and fast paced. It's told simultaneously from the view points of both characters which is uncommon for YA books, but very interesting to follow, as you can really get inside of the heads of both characters, not only the main hero's. 
 However, what I didn't really like is the fact that all grown-ups in this story don't seem realistic. Maybe I just need to take my pink glasses off, but I doubt that in real life if a kid has suicidal thoughts and actions his counselor at school would knowingly not report this further. All other grown-ups' behaviour also seems to be exaggerated: Violets perfect parents who are extremely supportive and rather calm for people who've lost their daughter a few months ago; Theodore's ignorant mother who doesn't ever check her voice mail, doesn't care about her children at all (although she's not a drunk or a junkie) and doesn't even come into her son's room. The only believable characters are Theo and Violet themselves. Don't get me wrong, I do know that there are stupid, selfish people in the world and I do get that Jennifer Niven was just trying to show her readers that sometimes serious issues do not get treated as such, which leads to irreversable consequences. Unfortunately, she could've done it better. 
 Nonetheless, this book is interesting and thought-provoking and I would recommend it for obligatory reading to all people who don't believe that depression is a real illness.