Preparing for the BPSC (Bihar Public Service Commission) Assistant Professor Exam requires a comprehensive study plan and access to reliable resources. Here are some recommended books and resources that can help you in your preparation:

1. NCERT Books: Start your preparation by thoroughly studying the NCERT books for the relevant subjects. These books provide a strong foundation and cover the basic concepts in a clear and concise manner.

2. BPSC Assistant Professor Previous Year Question Papers: Solving previous year question papers is crucial for understanding the exam pattern, question types, and time management. It also helps in identifying the important topics and areas that require more focus.

3. Reference Books: Apart from NCERT books, you can refer to the following books for a more in-depth understanding of the subjects:

- General Studies: "General Studies Paper I" by M. Laxmikanth, "Indian Polity" by M. Laxmikanth, "Indian Economy" by Ramesh Singh, "Modern Indian History" by Bipin Chandra, "Geography of India" by Majid Hussain.

- Subject-Specific Books: Depending on your subject specialization, you can refer to books like "UGC NET/JRF/SLET – Teaching & Research Aptitude" by KVS Madaan, "Objective Computer Science & Information Technology" by Er. Ajay Kumar, "UGC NET/JRF/SET Commerce (Paper II & III)" by Sanjay Gupta, etc.

4. Online Study Materials: Various online platforms like EduRev offer comprehensive study materials, notes, and practice questions specifically designed for BPSC Assistant Professor Exam. These resources are regularly updated and cover all the important topics.

5. Current Affairs: Stay updated with the latest current affairs by reading newspapers, magazines, and online news portals. Focus on national and international news, government schemes, important events, etc.

6. Mock Tests and Online Test Series: Practice mock tests and online test series to evaluate your preparation level and improve your time management skills. These tests simulate the actual exam environment and help you identify your strengths and weaknesses.

In conclusion, a combination of NCERT books, reference books, previous year question papers, online study materials, current affairs, and mock tests can provide a comprehensive preparation strategy for the BPSC Assistant Professor Exam. Make sure to create a study plan, allocate sufficient time for each subject, and revise regularly to maximize your chances of success.