Katharine Norbury was abandoned as a baby in a Liverpool convent. Raised by loving adoptive parents, she grew into a wanderer, drawn by the beauty of the British countryside.

One summer, following the miscarriage of a much-longed-for child, Katharine sets out - accompanied by her nine-year-old daughter, Evie - with the idea of following a river from the sea to its source. The luminously observed landscape provides both a constant and a context to their expeditions. But what begins as a diversion from grief soon evolves into a journey to the source of life itself, when a chance circumstance forces Katharine to the door of the woman who gave her up all those years ago.

Combining travelogue, memoir, exquisite nature writing, fragments of poetry and tales from Celtic mythology, The Fish Ladder has a rare emotional resonance. A portrait of motherhood, of a literary marriage and a hymn to the adoptive family, this captivating story of self-discovery is, most of all, an exploration of the extraordinary majesty of the natural world. Imbued with a keen and joyful intelligence, this original and life-affirming book is set to become a classic of its genre.