Laxmikanth is the best book to read for such topics. So if you can solely complete the book, your facts will be transparent and this will increase your understanding for the matter. So do consider the Laxmikanth book.

Also some other notable books you may consider are:

• Administrative Thinker by D. Ravindra Prasad
• Public administration by Mohit Bhattacharjee

Laxmikanth is the best and is followed by a lot of students. Now if you find it too lengthy or you think its not good for you then you may try Mohit bhattacharjee. The language is easier and elaborative for the book.

I hope my answer helps. All the very best for your future endeavors!