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The National Defence Academy commonly known as NDA is conducted twice a year by the Union Public Service Commission for recruitment into the Indian Military Academy, Indian Naval Academy and Indian Air Force Academy.

Best Books to Prepare for NDA are as follows-

Best books to prepare for NDA (Mathematics)

Mathematics for NDA/NA: National Defence Academy and Naval Academy-   RS Aggarwal

Quantitative Aptitude for competitive examinations-  RS Aggarwal

Study Package Mathematics NDA/NA Entrance Exam- Arihant

Best books to prepare for NDA (General Ability Test) as follows-

History Of Modern India (History)- Bipan Chandra

Science and Technology in India (Science and Technology)- Kalpana Rajaram: Spectrum

Oxford School Atlas (Geography)- Oxford

Social Problems In India (Indian Society – GS1)- Ram Ahuja

To know more books & Preparation tips for NDA, CLick below link-

https://competition.careers360.com/articles/best-books-prepare-for-nda-2018

All the best.