The big fear of the 1980s mortgage bond investor was that he would be repaid too quickly, not that he would fail to be repaid at all.
That's one good sentence from the book, which you can order here. There is an excerpt from the book, on Michael Burry, here. Here is a Felix Salmon review of the book. In terms of policy, Lewis attaches great weight to the fact that the major investment banks became publicly-traded companies rather than partnerships. I liked the stories and much of the inside scoop, but it didn't have the giddy fun of Liar's Poker or Moneyball nor did it have the analysis of some other books.