When Joanna Wolfarth was pregnant with her first child, she assumed she would breastfeed, as her mother had fed her. Yet she was unprepared for the startling realities of new motherhood. Then, just four weeks after the birth, she found herself back in hospital with an underweight baby, bewildered by inconsistent advice and overcome with feelings of guilt and isolation.

Months later, her cultural historian's impulse led her to look to the past for guidance. What she discovered, neglected in the archives, amazed and reassured her. By piecing together cultural debris - from fragments of ancient baby bottles to eighteenth-century breast pumps, from the Palaeolithic Woman of Willendorf figurine to the poignantly inventive work of Louise Bourgeois and from mythical accounts of the creation of the Milky Way to advice found in Victorian medical manuals - Joanna began to understand how feeding our babies can be culturally, economically and physiologically determined as well as deeply personal and emotive.

Using the arc of her own experience, Joanna takes us on an intimate journey of discovery beyond mother and baby, asking how the world views caregivers, their bodies, their labour and their communal bonds. By bringing together art, social histories, philosophy, folk wisdom and contemporary interviews with women from across the world, Milk reveals how infant feeding has been represented and repressed, celebrated and censured. In doing so, Joanna charts previously unexplored territory of motherhood.