The Drishti IAS book "10 Previous Year Topic Wise UPSC Civil Services IAS Mains Solved Papers (2022 to 2013)" offers comprehensive solutions to 10 IAS Mains Original Papers, including Qualifying Paper 1 (Compulsory English), Paper I (Essay), and Paper II - V (General Studies Papers 1 to 4). One of the book's main highlights is its division into 6 parts, based on the subjects involved (different Papers). Each part is further categorized into topics based on the respective paper components and the latest UPSC syllabus, with questions from all 10 years grouped under the relevant topics. Additionally, the topics are further divided into sub-topics, wherever necessary. Part 1 of the book, Qualifying Paper 1 (Compulsory English), contains 10 Comprehension, 38 Essays, 10 Précis, and 500 Grammar Questions. Part 2, Paper I (Essay), consists of 76 essays that follow the Word Limits. These essays are categorized into various topics. Parts 3-5 consist of 200 questions each from GS Papers 1-3, respectively, with 20 questions from each year. The questions are divided into various topics based on the syllabus of each respective paper. Part 6 contains 120 questions from GS Paper 4, with 12 questions from each year. Like the other parts, the questions are divided into various topics based on the syllabus of GS 4. All solutions have been meticulously prepared after thorough research, with strict adherence to the Word Limit suggested by UPSC for each question. Detailed solutions are provided immediately after each question, making the book extremely user-friendly. Besides UPSC exams, this book is also useful for various State PSC Exams.