1. Study material forms an integral part of the Civil Services Exam . Choosing the right study material goes on to ensure the complete preparation of the HAS Exam .Study material for the exam is almost identical to the Indian Administrative Services Exam .The question lists the popular books for the HAS .Here are some of the books that are most commonly followed by the students preparing for the HAS Exam.The topic wise books for the Preliminary are mentioned below:
2. Follow the NCERT books for conceptual clarity and an in-depth study of relevant topics from standard books listed below.
3. Ensure to go through newspapers and magazines to master economic, political, social issues and policy changes.
4. Read Giriraj Magazine to track socio-economic, political and development issues related to Himachal Pradesh.

Current Affairs

1. The Hindu
2. The Tribune, Himachal edition.

Magazines

1. Yojana Magazine.

Books

1. Indian Polity by M. Laxmikanth.
2. India Economy by Ramesh Singh.

NCERT books Class 9–12th standard.
History

1. Follow History Books of NCERT books 6–12th
2. History of Modern India by Bipin Chandra
3. India after Gandhi by Ramachandra Guha

Geography

1. Physical and Human Geography by G.C. Leong.
2. Oxford Atlas

Science and Technology

1. NCERT books from class 6–10th standard.
2. Environment and Ecology

Himachal Pradesh General Knowledge

1. The wonderland Himachal by Jag Mohan Balokhra
2. Himachal Pradesh, History, Culture, and Economy by Mian Goverdhan Singh

Ensure to have a strict time table and follow it diligently. Divide your time wisely and spend it on reading and understanding the study material. Avoid mugging the concept snad focus on understanding. Revision is the key to success and after completing a chapter ensure to test your skills by solving as many questions as possible. Enrol in some good coaching institute for test series. Understand your weak areas and make efforts to strengthen them. Monitor your speed by practicising a complete test and getting your scores evaluated after regular intervals