The book contains solved previous year questions of UPSC Civil Services Preliminary Examination from 2011-2024. The questions have been segregated subject-wise as well as topic-wise to make it more accessible for the students. The rationale behind including the questions starting from 2011 is the major shift in the pattern and difficulty level of the preliminary examination post- 2011. A compilation from 2011-2024 ensures that the questions are in-line with the latest trend of the exam.