More than one in five Americans experiences some form of mental illness every year, from depression to schizophrenia.

Teen books that deal with mental health issues:

Med Head: my knock-down, drag-out, drugged-up battle with my brain by James Patterson & Hail Friedman
"...Here is the harrowing and heroic true story of Cory Friedman, an ordinary teenager whose courage and determination to climb out of a lifelong medical turmoil and personal suffering enabled him to ultimately survive and thrive against all odds."--P.[4] of cover.   
 

Suicide Notes by Michael Thomas Ford
Brimming with sarcasm, fifteen-year-old Jeff describes his stay in a psychiatric ward after attempting to commit suicide.   
 

The Death of Jayson Porter by Jamie Adoff
In the Florida projects, sixteen-year-old Jayson struggles with the harsh realities of his life which include an abusive mother, a drug-addicted father, and not fitting in at his predominately white school, and bring him to the brink of suicide.      
 

Skim by Mariko Tamaki
"Skim" (Kimberly Keiko Cameron) is a not-slim would-be Wiccan goth who goes to a private girls' school. When her classmate Katie is dumped by her boyfriend, who then kills himself, the entire school goes into mourning overdrive. The popular clique stars a club to boost school spirit, but Skim sinks into an ever-deepening depression.  

Tears of a Tiger by Sharon Draper
Whether through their own self-destructive behavior or the suicide of a friend, the characters in these books are forced to deal with effects that suicide has on their lives.   
 

You by Charles Benoit
Fifteen-year-old Kyle discovers the shattering ramifications of the decisions he makes, and does not make, about school, the girl he likes, and his future.