"Notes on Nursing: What It Is, and What It Is Not" by Florence Nightingale is a book published in 1859. This groundbreaking guide offers practical hints for anyone caring for the sick, covering ventilation, cleanliness, food, noise, and patient observation. Nightingale emphasizes a holistic approach, arguing that symptoms arise from unmet needs rather than disease itself. Published at a pivotal moment when nursing was transitioning from domestic duty to professional practice, this work shaped modern nursing education and remains influential today.