Hello Ishi!

These are the following books which are generally referred for firm understanding of the syllabus and  proper preparation for PU LLB.

• CLAT and LLB entrance examination study package, A.P Bhardwaj
  
• The Ultimate Guide to the LLB Entrance Examination, M A Rashid
  
• Model Test Papers for CLAT and LLB,A.P Bhardwaj
  
• The Pearson Guideto LLB Entrance, Thrope
  
• LLB Entrance Examination Guide, pankaj kr. Jaiswal
  
• English Legal System, Susan Mckenzie
  

General Knowledge is in itself is a very diverse subject. For static G.K you can avail to various online offline material and past year papers and for current G.K  You can refer to magazines issued by various media publishing houses. Also it is necessary to view part year papers and question papers of other examinations to get an overview of the level of difficulty and type of questions asked. Keep practicing mock tests to have a control on the time.

Hope this helps. All the best!