hello abhishek,

i suggest you to go through the given link to get the best preparation tips given by experts,

• https://competition.careers360.com/articles/how-to-prepare-for-nda-2018

for best books,

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

all the best!

note:if any links available,copy and paste it in the url bar of your browser.

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)