Book excerpt: The presented book UPSC Civil Services 29 Years - IAS Prelims - GS Paper 1 & CSAT Paper 2 which is thoroughly revised and updated and is in 2-color texts covers the questions of the last 29 years for General Studies (1995-2023) & CSAT (2011-2023). A chapters have been prepared according to the previous years UPSC Civil Services Prelims Paper & The book has also been incorporated with Information & Instructions for Civil Services Exams; Plan & Schemes of Examinations, Tips & Strategies along with Time Management for Civil Services Exams Preparation. Explanations are error free as well as precise. Asked questions are arranged in topics such as History of India, Physical, Indian & World Geography, Indian Polity & Governance, Economic & Social Development, General Issues on Environment, Ecology, Bio-diversity & Climate Change, General Science, General Knowledge and Current Events. In CSAT question papers are categorised such as General Comprehension, Interpersonal