Crack Civil Services General Studies IAS Prelims (CSAT) - Paper 1 Third Edition is an affordable and easy to get book from DISHA PUBLICATION for the preparation of GK section of IAS prelims. This book has Study Guides, test preparation material, skill assessments; previous year IAS exams question papers (with solved answers) and lots of MOCK TEST papers for effective and result oriented preparation of the exam and get success it.