"Left Neglected" is a novel by Lisa Genova that explores the life of a woman named Sarah Nickerson, who suffers from a rare condition called left neglect. This condition occurs after a traumatic brain injury, causing her to be unaware of the left side of her body and environment. The story delves into her struggles to adapt to this new reality and the impact it has on her relationships and career. As Sarah navigates her challenges, she learns to reconnect with her family and rediscover her sense of self. The novel highlights themes of resilience, the importance of family, and the journey of healing after trauma.