Best books for UGC NET Exam for Management includes the following:
1. Trueman's UGC NET Management.
2. Marketing Management; Philip Khotler.
3. Managerial Economics; Varshney, Maheshwari.
4. UGC NET/SET Management; Seema Kumari.
5. Business Environment; B.N Ghosh.
6. Principles of Management; Tripathy and Reddy.
7. Microeconomics; G.Madalla.
Along with these you can always thoroughly go through the previous year papers. It will be beneficial for you to understand the pattern of questions well and score better.
Hope this helps, good luck!