Stephen is an ideal child of aristocratic parents—a fencer, a horse rider and a keen scholar. Stephen grows to be a war hero, a bestselling writer, and a loyal, protective lover. But Stephen is a woman, and her lovers are women. As her ambitions drive her, and society confines her, Stephen is forced into desperate actions.

The Well of Loneliness was banned for obscenity when published in 1928. It became an international bestseller, and for decades was the single most famous lesbian novel. It has influenced how love between women is understood, for the twentieth century and beyond.

Physics seems to have become the new language of love in the 1990s, and Jeanette Winterson is not the first writer to make a major character a physicist. Jonathan Lethem mined similar territory earlier this year in his delightful book, As She Climbed Across the Table, and now Winterson enters the lists with not one, but two physicists populating the pages of her equally wonderful book, Gut Symmetries.

If you think about it, physics does make a good metaphor for love, encompassing as it does the principles of attraction, the exchange of energy, and unification. At the center of this meditation on "the intelligence of the universe" and "the stupidity of humankind" are Jove, a married physicist; Alice, a single physicist who becomes his mistress; and Stella, Jove's wife and later, Alice's lover. They meet on the QE2 and from there the three participants in the story take turns telling their versions of it.

Gut Symmetries is a collage of memories, snippets of scientific theory, meditations on abstract concepts like truth, and the events surrounding Jove, Alice, and Stella's affair. This is a book that demands your attention, jumping as it does from one seemingly tangential topic to another; but whereas physics still seeks a grand unification theory (GUT) to explain how everything in the universe fits together, Winterson actually finds one of her own in this satisfyingly complete fictional world.