I am a big fan of this little green book series. I taught myself a bunch of advanced quantitative methods with these books includingPrincipal Components Analysis (Quantitative Applications in the Social Sciences),Cluster Analysis (Quantitative Applications in the Social Sciences), andDiscriminant Analysis (Quantitative Applications in the Social Sciences).This is a good book on the subject. But, the matter is far more complicated than I anticipated. I definitely need to study this book in detail a second time around. However, it covers many of the relevant measures of statistical significance related to ordinal data. I think this short book covers the needs of the novice as well as the expert statistician. I'll keep this book as a valuable reference on the topic.