Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Mastery of Submission : Inventions of Masochism

If you are looking for an upper division college text style book on BDSM you just found one. The book is most certainly not designed for the causal reader. Its dry reading, and has a habit of taking making any point. In general it is much more fun to read the quotes they used rather then the whole book. For the college student researching BDSM this book might be more helpful. To the people in the scene just avoid this book, there really isn't much in it that you can't find elsewhere and in a better format.