In the course of revision and updation of this edition of the book, various new developments related to the subject, like recent constitutional amendments, parliamentary legislations, executive decisions and supreme court judgments, have been taken into account.

Changes in this Edition:

1. Addition of 6 new chapters.

2. Inclusion of 2017, 2018 and 2019 preliminary questions with answers.

3. Inclusion of 2016, 2017, 2018 and 2019 main questions.

4. Updation of the year-wise break-up of the UPSC questions in the preliminary and main examinations.

5. Inclusion of additional updated information on a number of topics.

6. New items included in various chapters.

7. Inclusion of Videos to recapitulate selected key concepts.

New Chapters:

1. Goods and Services Tax Council

2. National Commission for Backward Classes

3. National Investigation Agency

4. National Disaster Management Authority

5. Role of Regional Parties

6. Coalition Government