The NCERT book for Class 9 Political Science is a handy reference guide that offers an in-depth look at the various forms of government, along with an analysis of their strengths and weaknesses. It also provides the reader with an insight into the nature of political power, how it is exercised, and how the various institutions of the state work. 

This is all provided in a very easy and practical way, with examples and illustrations that the reader will find very helpful. 

The app provides a detailed look at the different forms of government, as well as an analysis of their strengths and weaknesses.