The book 6 years UPSC Civil Services IAS Mains topic-wise Solved Papers (2020 to 2015) Consists of solutions to 6 IAS Mains papers – Qualifying Paper 1 (compulsory English), Paper I (essay), & Paper II - V (General Studies Papers 1 to 4). The USP of the book is the division of the book into 6 parts as per the 6 IAS Mains papers. Each of the parts is further divided into topics as per the respective Paper components & latest UPSC syllabus. The questions of all the 6 years are grouped under the respective topics. Wherever required The topics are further divided into sub-topics. Part 1 – Qualifying Paper 1 (compulsory English) consists of 6 Comprehension, 24 essays, 6 précis and 300 Grammar questions. Part 2 - Paper I (essay) consists of 48 essays written in adherence to the word limits. The essays are classified into various categories (topics). part 3 - Paper II contains 120 questions of GS Paper 1 (20 in each of the 6 years) divided into various topics based on syllabus of GS 1. Part 4 - Paper III contains 120 questions of GS Paper 2 (20 in each of the 6 years) divided into various topics based on syllabus of GS 2. Part 5 - Paper IV contains 120 questions of GS Paper 3 (20 in each of the 6 years) divided into various topics based on syllabus of GS 3. Part 6 - Paper V contains 78 questions of GS Paper 4 divided into various topics based on syllabus of GS 4. The solutions have been prepared after a thorough research and adhered to the word limit as suggested by UPSC for each question. The detailed solutions are provided immediately after each question. The book is also useful for all state PSC exams.