Hello,

Candidates can find below the best books for NDA preparation. 

Mathematics

• Mathematics for NDA/NA: National Defence Academy and Naval Academy - RS Aggarwal
• Study Package Mathematics NDA/NA Entrance Exam - Arihant
• Quantitative Aptitude for competitive examinations - RS Aggarwal
• NDA Entrance Exam - E. S. Ramasamy

General Ability Test (GAT)

• General Knowledge 2019 - Arihant
• History Of Modern India - Bipan Chandra
• Science and Technology in India - Kalpana Rajaram: Spectrum
• Objective General English for Competitive Exams - S.P. Bakshi

Read here for more details - https://competition.careers360.com/articles/best-books-prepare-for-nda

Thank you

You can refer Arihant Publication book for NDA.

In addition to it for your Genaral ability and general knowledge part, refer to the class 10th books of Social Science and Science, which will cover you history, civics, political science and geography part, and the other one will cover you physics, chemistry and biology.

For general knowledge, you can refer Pratiyogita Darpan.

For Mathematics, Arihant refresher

For English vocabulary and grammar- Arihant

Good Luck!