His character never evolves, and the dialogue grows increasingly polemic as his story becomes a case study of the postwar anticommunist witch-hunt. When Harrison returns to the States, however, the novel wilts. Kingsolver is at her best in the pages brimming with the seductive energy of ’30s Mexico: its colors, tastes, smells, the high drama of Trotsky and Kahlo, but also the ordinary lives of peasants and the working poor. In 1935, Harrison returns to Mexico, where he becomes first a lowly but beloved member of the Diego Rivera/Frida Kahlo household, then secretary to Leon Trotsky until Trotsky’s assassination. His disastrous two-year stint at boarding school back in America is marked by his awakening homosexuality (left vague thanks to the lacuna of a missing diary) and his witnessing of the Hoover administration’s violent reaction to a riot of World War I homeless vets. As his mother moves from man to man, Harrison learns to fend for himself.

There Harrison discovers his first lacuna, an underwater cave that leads to a secret pool.

In 1929, Harrison’s Mexican-born mother deserts his American father, a government bureaucrat, and drags 11-year-old Harrison back to Mexico to live with her rich lover on a remote island. Set in leftist Mexico in the 1930s and the United States in the ’40s and ’50s, the novel is a compilation of diary entries, newspaper clippings (real and fictional), snippets of memoirs, letters and archivist’s commentary, all concerning Harrison Shepherd. Unapologetically political metafiction from Kingsolver ( Prodigal Summer, 2000, etc.) about the small mistakes or gaps (lacunas) that change history.

The lacuna by barbara kingsolver