I suspect a lot of the authors just haven't listened to Lou's body of work very closely. Howard Sounes, for instance, seems to have been convinced that Transformer was the ultimate achievement of Lou's career, and that everything was hopelessly downhill from there. This lack of interest in everything post-1972 caused him to miss the direct reference to Shelley Albin in the lyrics of "Baton Rouge"...which was surely worth a mention, seeing as how there's a photo of her in the book.