Sir John Richardson published the first volume of his monumental A Life of Picasso: The prodigy, 1881–1906, in 1991. The second volume, The painter of modern life, 1907–1917 illuminating the Cubist years, followed in 1996. The next volume, The triumphant years, 1917–1932, appeared eleven years later and gave rise to speculation as to how Richardson, then seventy-three, could complete his ambitious task with nearly thirty years of prodigious production on the artist’s part still to be covered. Now we have the fourth and final volume, The minotaur years, published posthumously – Richardson died in 2019 – with a lot of assistance. It’s the shortest, least compelling volume of the series.