Not only a good review of bubbles, but a look at risks associated as well
"Overall, the main problem is not the price correction per se, but the fact that the necessary correction often occurs only very late, at which point risk and large imbalances have built up. The trigger event that catalyzes the crisis does not have to be an event of major economic signicance when seen by itself. For example, the subprime mortgage market that triggered the recent nancial crisis made up only about 4% of the overall mortgage market. However, because of amplication eects, even small trigger events can lead to major nancial crises and recessions"