The Drowned Fens - The Drowned Atlas, Book 4

For years Wren has chased a wake across the drowned coasts of Britain, always a season behind the woman she loves. Now a letter brings her east into the fen-meres, and the trail ends at last in a place that holds Rhea, not a rumour of her.

Then the hardest freeze in fifty years comes down. The meres set to iron, the water-roads close, the scattered island communities of the Mere-folk are cut off one from another, and Rhea is sealed on the farthest ey of all, a few miles off across the one current the cold cannot still.

For the whole of her life Wren has answered every distance by moving. Here the water has stopped, and so has she. To reach anyone across the killing ice, she will have to learn a winter that takes the impatient first.