If you want dry history and biography, go elsewhere. Blackburn's talent is in immersing herself in a very personal and empathetic way in the world of Goya. I started Blackburn's The Book of Colour years ago, but dropped it quickly - her style annoyed me then but now I see that she hadn't yet found her stride, was bravely experimenting and failing.
More and more, I hear people saying that they are finding their "portal" to history through this innovative post-modern kind of biographical historical melange. Anyone who calls this work self-indulgent misses the point. Anyone who doubts Blackburn's intelligence and skill as a writer in pulling this together is deluded. I am astonished by how vividly she conjured the world that she imagined Goya saw, without relying on turgid passages of description. Love the impressionistic style. Feel that the reviewer who said she's a poor John Berger imitation was being a bit harsh. Let her have her idiosyncratic and at times brilliant style. There's enough potted history about without Blackburn adding to the canon.