This book is very important book for upsc preliminary and mains.it is helpful not only for upsc civil services but also for competitive exams like tnpsc group 1, group 2, group 4 and group 1 mains.it covers tnpsc syllabus in detail.it was easily understandable, many questions in indian polity asked in upsc prelims can be answerable easily by studying this book.this book is more for ssc cgl level as there are few questions come in indian polity but good for other exams.