My Loose Thread by Dennis Cooper

Larry is a teenager wrestling not only with his sexuality and the implications of a physical relationship with his younger brother, but with the very point of his existence. He is numb to almost all that surrounds him.
As the book opens, Larry has been paid $500 by a senior to kill a fellow pupil and retrieve the boy's notebook. It seems simple enough. However, once Larry delves into the notebook, complications arise.
An immensely powerful work that explores teenage depression, moral vacuity and the confusion of love, My Loose Thread is a claustrophobic and harrowing piece of fiction.