The Ultimate Baby Sleep Training Handbook: Proven Strategies to Help Your Baby Sleep Through the Night

Marilyn Collier is a pediatric sleep consultant, certified lactation counselor, and the founder of Restful Nights, a private sleep consulting practice that has served over 4,000 families across the United States, Canada, and the United Kingdom. With more than fifteen years of experience working with infants, toddlers, and their parents, Marilyn has developed a reputation for creating sleep plans that are both evidence-based and deeply respectful of each family's unique values and circumstances.

Marilyn's journey into pediatric sleep began after the birth of her first child, when she experienced the depths of sleep deprivation firsthand. Her son did not sleep through the night until he was fourteen months old, despite her best efforts and extensive reading. That experience drove her to understand not just the science of infant sleep but also why so many well-intentioned parents struggle to implement the advice they read. She became certified through the Family Sleep Institute and went on to complete advanced training in perinatal