The book itself is very enjoyable, as is entirely typical of Michael Lewis’ books.
The book is somewhat fascinating. But also depressing. Alan Greenspan had the authority to curtail the excesses of the banks which led to this collapse. He gave Congress the incredibly lame excuse that he believed the banks would be more responsible and careful (my paraphrase).
IMO Greenspan has always been the egghead-doosh that he has always seemed.