Helen Gibbs, a British journalist on assignment on the west coast of Mexico, meets Christopher Delavaux, an intriguing half-French, half-American lawyer-turned-financier who has come alone to surf. Living lives that never stop moving, from their first encounter in Bermeja to marriage in London and travels to such places as Saint-Tropez, Tangier, and Santa Clara, Helen and Christopher must decide how much they exist for themselves and how much they exist for each other.

A Theory of Love captures the ambivalence at the center of human experience: does one reside in the familiar comforts of solitude or dare to open one's heart and risk having it broken? Set in some of the most picturesque places in the world, Margaret Thornton's incisive novel questions what it means to love someone and leaves us wondering: can nothing save us but a fall?