Hey Anurag,

 General knowledge has two parts, one is static general knowledge and the other is current affairs. Following are some of the all-time important books for  both static and current affairs related to General Knowledge,

- Static general knowledge,

• Lucent General knowledge 
• Arihant General Knowledge
• Pearson General Knowledge
• NCERT 6th -10th

- Current Affairs,

• Made-Easy Monthly 
• Competitive Success Review
• Manorama Year Book

In addition to this, there are sites which are famous for current affairs,

• GKtoday
• Jagaran Josh

Hope it helps you.

All the best

Hey Anurag,

 General knowledge has two parts, one is static general knowledge and the other is current affairs. Following are some of the all-time important books for  both static and current affairs related to General Knowledge,

- Static general knowledge,

• Lucent General knowledge 
• Arihant General Knowledge
• Pearson General Knowledge
• NCERT 6th -10th

- Current Affairs,

• Made-Easy Monthly 
• Competitive Success Review
• Manorama Year Book

In addition to this, there are sites which are famous for current affairs,

• GKtoday
• Jagaran Josh

Hope it helps you.

All the best.