Just a quick post for any who are interested. I found while searching for something completely unrelated that google print has made available the full text of the book "Extraordinary Popular Delusions & the Madness of Crowds" by Charles Mackay. The book is notable for a number of reasons ,not the least of which is its mention in James Surowiecki's book the "Wisdom of Crowds". Surowiecki, in part at least, structures his best selling book as a response to the incidents that Mackey recounts in his work. Both books are interesting reads and in many ways fundamental to the development of social software both inside and outside the library.