Cancer vs Therapy is a personal memoir that tells the story of an Iranian man raised in a traditional Shia Muslim family who embarked on a journey of faith, freedom, and self-discovery. Through personal experiences, historical reflections, and religious exploration, Mahdi Hadavi recounts his path from Shia Islam to membership in The Church of Jesus Christ of Latter-day Saints. The book examines the author's experiences with religion, family, social pressures, and life in Iran while sharing the challenges and consequences of religious conversion. Combining autobiography, spiritual reflection, and social commentary, this work offers readers a unique perspective on faith, personal choice, and the search for truth. Cancer vs Therapy is a story of hope, resilience, and the belief that every individual has the right to seek spiritual freedom and follow their conscience.