"The Moonstone Covenant is a many-layered feat of the imagination, gathering the stories of four very different women who share a marriage—as difficult a feat in their world as it would be in ours—and spinning them through the traumas of a world on the edge of chaos, a place where magic is core to the lives of the women who wield it, but is loathed and feared by those who surround them. Each wife's viewpoint, her unique voice, opens up the weave of this world, leading us by the hand into a magical and spiritual system deeply embedded in the earth: trees speak here, and have opinions that can change the way the world works.

In lyrical and beautiful language, Jill Hammer lays bare the prejudices of an island landscape where the waterways are as important as highways. Through the tale of a four-way marriage, she carries us into the depths of relationships between women, the flows of feeling and passion, history and trust, treachery both imagined and real. Betrayal lies at the heart of this story, but its healing is a thread running through from the start. A genuinely engaging, enlivening, and inspiring read!"—Manda Scott, author of Any Human Power and host of the Accidental Gods podcast

"Part murder mystery, part political thriller, part fantasy epic, The Moonstone Covenant celebrates the power and wisdom of books, the natural world, and queer love. This wondrous novel is a gift of imagination for readers everywhere."—Jonathan Vatner, author of Carnegie Hill and The Bridesmaids' Union

"Like Tolkien and LeGuin, Jill Hammer has conjured up a richly detailed world, alive with magic, political intrigue, and a robust cast of fascinating characters. Readers of fantasy will love this book!"—Ellen Frankel, author of The Deadly Scrolls