"No one knows for certain how much impact they have on the lives of other people. Oftentimes we have no clue. Yet we push it just the same." This is the theme of Thirteen Reasons Why, a young adult novel describing the events leading up to a teen suicide. 
 When Clay receives a box of cassette tapes (!) in the mail, he finds on them the voice of Hannah, a classmate who committed suicide a few weeks before. She goes on to say that there are 13 reasons why she is killing herself, and if you receive the tapes, you are one of those reasons, so please give them a listen, and pass them on to the next person on the list. 
 I was surprised by this premise, as most books go out of their way to reassure survivors that the suicide victim was ill, and that nothing could have been done to stop them. Hannah goes so far as to assign blame to specific people: not only people who hurt her (whether they intended to or not) but also to people who did not try hard enough to help her when she was displaying all of the characteristics in the suicide pamphlet. 
 I was completely drawn in. Clay seemed like a nice enough kid; what could he have so innocently done wrong that would have landed him on such a list? Ultimately, I was disappointed in that (view spoiler)[(He was too nice and perfect and she just wanted to explain herself to him? REALLY?) (hide spoiler)] and some other aspects of the story, but I can appreciate its message: the effects of small actions do add up, so casual griefing can do more harm than you intend.