At the moment I'm reading the catalogue from the current retrospective of the artist Cy Twombly on at Tate Modern in London. I haven't read a catalogue so thoroughly for a long time. There are lots of interesting essays amongst images from the exhibition. At the back of the catalogue there's a chronolgy which is illustrated with fabulous portraits of the artist. The exhibition itself has been beautifully curated. The rooms of paintings are organised chronologically and are interspersed with Twombly's sculptures. This is a major retrospective of the American artist, who at 85 has spent most of his career living in Italy.