Magnificent Obsession is a novel by Lloyd C. Douglas, published in 1929. It tells the story of a spoiled and reckless young man named Robert Merrick, whose life takes a dramatic turn after he survives a boating accident at the expense of another man's life. The deceased, Dr. Hudson, was a renowned physician and philanthropist beloved by his community, and his untimely death leaves a deep void.

Wracked with guilt, Merrick learns about Dr. Hudson's philosophy of living: he believed in an anonymous, altruistic approach to helping others without expecting any recognition or return. Inspired, Merrick decides to follow this path, using his wealth and resources to do good quietly, transforming his life and character in the process. He eventually becomes a skilled doctor, working tirelessly to redeem himself by helping others, all while falling in love with Dr. Hudson's widow, Helen, who initially knows nothing of his transformation.

The book explores themes of selflessness, redemption, and the power of personal transformation. It was extremely popular upon release, inspiring a successful film adaptation in 1935 and again in 1954, starring Rock Hudson and Jane Wyman. Magnificent Obsession continues to be appreciated for its inspirational and moral themes, which resonate with readers interested in personal growth and redemption stories.