Choosing best books for NDA test is the initial step of clearing NDA test since its important to choose best sources which can yield greatest inquiries in NDA assessment. The sources should be restricted so numerous revision turns out to be simple. Since in any aggressive test led by UPSC, you can't clear test without various revision and sufficient practice. 
I have as of now made NDA Math and NDA GAT planning methodologies which are definite procedures which require 7-8 months of readiness and give ensured a positive outcome. 

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Numerous competitors mentioned to make a procedure with "Arihyant NDA and NDA Pathfinder book". That is the motivation behind why I have caused procedure to clear To NDA test with Pathfinder book in 3-4 months. You can score 450+ Marks on the off chance that you concentrate on some significant sources alongside NDA Pathfinder book which will be told in this article. 
About NDA Exam and Best BOOK 
You are still continued this article which implies you have fundamental data about NDA test. Yet at the same time I will jump at the chance to give outline of NDA test in 5 focuses so that understanding the procedure turns out to be significantly more simple: 
You need to confront 2 papers (GAT and Math) around the same time to cLear NDA composed test. 
a.    Arithmetic test for 150 minutes of 300 imprints 
b.   General Ability Test for 150 minutes of 600 imprints 
        c.    All out Marks are 900 
2. Around 4,50,000 applicants apply for NDA 1 test led in April and relatively less wannabes apply for NDA 2 test held in September for just 400-450 opportunities. In this way, you can comprehend the degree of rivalry for NDA test. 
3. Trouble level of NDA paper is expanding step by step which needs definite review for the two papers of NDA. 
4. You need to clear the singular cut off just as by and large NDA slice off to fit the bill for SSB Interview. 
5. Prior to 3 years, NDA Pathfinder Book was adequate for NDA arrangement But with the changing pattern of NDA test and expanding dificulty level, its important to concentrate on some other significant sources alongside NDA Pathfinder 2020 book. 
Along these lines, presently you have a fundamental thought with respect to 'contest for NDA test' and the degree of commitment needed to beat the 
The link to download the physics part of NDA NA book free

https://drive.google.com/file/d/18gX7HeobHVpjEkME5UPLIMb6PJPdGRrL/view?usp=drivesdk