For Thinkers
Administrative Thinkers by Prasad & Prasad or Administartive Thinkers and Management Theroies by R.K. Sapru
IGNOU material.
Fadia and Fadia
New Horizons of Public Administration by Mohit Bhattacharya.
For Quick Revision - Public Administration Paper I by Radhabinod Aribam IAS
Public Administration by Ramesh K Arora & Rajni Goyal.
IGNOU Material.
Second ARC reports.
Standard Current affairs sources like Yojana,Kurukshetra + Daily NewsPaper.
For Quick revision - Public Administration by Radhabinod Aribam IAS.
IIPA journals for any further Value addition.