Nothing

Could this be the bleakest YA ever? It would get my vote.

Here is the story: Pierre decides that nothing matters, walks out of his classroom, climbs up into a tree, and refuses to come down. The others in his classroom feel compelled to try to convince Pierre that some things do matter. Using increasingly bizarre and horrific methods, Pierre's classmates attempt to demonstrate that things matter.

While I respect what this author was doing with this book, it is most definitely not my cuppa tea.