Sue Klebold's memoir about Columbine is stunning in the way it shatters our ideas about parenting: that every good and present parent must know the mental state of their child. Her experience shows us that can be false.
Klebold's book gives a personal recounting of her life in the almost 20 years since Columbine. She focuses on what she terms "brain health" and how she has turned her sorrow into activism. I would suggest the audiobook, as she narrates it herself.