"A Mother's Reckoning" is a memoir by {Sue Klebold}, the mother of {Dylan Klebold}, one of the perpetrators of the {Columbine High School shooting} in 1999. In the book, she reflects on her son's life, the events leading up to the tragedy, and her feelings of guilt and confusion. Klebold explores themes of mental health, the challenges of parenting, and the impact of violence in society. She aims to raise awareness about the signs of emotional distress and the importance of seeking help, hoping to prevent similar tragedies in the future.