Emily Oster’s book is a practical guide for parents, helping them cope with anxieties and worries during their child’s first years of life. Drawing on scientific data and research, the author debunks common parenting myths and offers an approach based on facts—not fears or prejudices. The book covers various aspects of infant care, including breastfeeding, sleep, introducing solids, and early development. Oster helps parents make informed decisions, avoiding unnecessary stress and feelings of guilt.