The river has roots

"In the small town of Thistleford, on the edge of Faerie, the mysterious Hawthorn family tends the willow trees there. For as long as anyone can remember, the Hawthorns have paid tribute to the willow trees, honouring an ancient compact to sing to them in thanks for their magic. None, though, have taken up this calling more devotedly than the family's latest daughters, Esther and Ysabel, who cherish each other as much as they cherish the trees. But when Esther rejects a forceful suitor in favour of a lover from the land of Faerie, not only the sisters' bond but also their lives will be at risk"--Inside jacket flap.