Hii dear,

Here is a short list of the books to prepare for civil services

1. Indian Polity by Laxmikanth
2. Environment by Shankar
3. Struggle for Independence by Chandra
4. Brief History of Modern India
5. Indian Art and Culture
6. Indian Economy by Ramesh Singh
7. Physical Geography by Goh Cheng Leong
8. Oxford publication Atlas for geography

But The best book for civil service exam is NCERT class 6th to 12th. You may also read special book for specific subject

All the best .

Hope it's Useful

Thank you!!