I'm not a big reader of Hollywood/Theatre bios but this one is very good. Judy is largely forgotten, but she had a comedic genius that influenced a number of later actors. The ultimate dumb blonde on screen, Judy was actually very smart, kind, and, like a lot of stars, had deep-seated insecurities. The author really knows his stuff about Broadway, the contract system in Hollywood, and gets details exactly right about her tastes and personality (full disclosure: my cousin-in-law was her son's governess).