In Joan Didion: What She Means, the writer and curator, Hilton Als, creates a mosaic that explores Didion’s life and work and the feeling each generates in her admirers, detractors and critics. Arranged chronologically, the book highlights Didion’s fascination with the two coasts that made her. As a Westerner transplanted to New York, Didion was able to look at her native land, its mores and fixed rules of behavior, with the loving and critical eyes of a daughter who got out and went back. Didion and her late husband moved from New York to Los Angeles in 1964, where they worked as highly successful screenwriters, producing scripts for 1971’s The Panic in Needle Park and 1976’s A Star Is Born, among other works before returning to New York 20 years later. And from her New York perch, Didion was able to observe the political scene more closely, writing trenchant pieces about Clinton, El Salvador, and most searingly the Central Park Five. The book includes 50 artists ranging from Brice Marden and Ed Ruscha to Betye Saar, Vija Clemins and many others, with 250 works in all mediums including painting, ephemera, photography, sculpture, video and film.