The volume is a collection of essays and cases on water federalism. The contributors are a well-known group of academics, practitioners, and civil society actors. Commissioned by the Hanns Siedel Foundation in collaboration with Asian Confluence, the book makes a conscious effort to go beyond the dominant lens of interstate water disputes to engage with a range of dimensions of water federalism. India’s long term water security interests lie increasingly in the realm of cooperative federalism. The flagship programs like river rejuvenation or inland navigation depend on the crucial element of Centre-states and interstate coordination. The book makes a humble and modest beginning to draw attention to this critical dimension.