The General Studies Paper 4, of UPSC CSE EXAMINATION is commonly known as the Ethics, Integrity and Aptitude paper is an important one in the larger scheme of things. This is because the Ethics paper can alter your UPSC mains score in a big way. It is generally a vital scoring paper but because of its slightly off-beat nature compared to the other three GS papers, candidates have a real tough time deciding their preparation strategy for this paper. The paper is equally divided between theory and case studies.
| Subject | Name of the Book | Author/Publications |
| ETHICS, INTEGRITY & APTITUDE | Ethics in Governance | ARC Report |
| ETHICS, INTEGRITY & APTITUDE | G Subba Rao |