Dear Devwrat,

The Arihant Pathfinder is one of the best guides for the National Defence Academy Entrance Exam. A lot of the candidates who have cleared the exams will tell you the same as well. The Pathfinder covers all the syllabus that you need for your NDA Entrance Exam and has a lot of sample questions and previous year question papers and all the resources you will need to clear the NDA Entrance Exam. So, it would be better if you stick with the Pathfinder.

I hope this was able to help you if you got any more questions, then please do ask again.

Hello.

Yes Pathfinder is good suggestable one and here is the list of books you may refer

1. MATHEMATICS FOR NDA AND NA:

NATIONAL DEFENCE ACADEMY AND NAVAL ACADEMY Paperback – 2003

by Aggarwal R.S. (Author)

2. Pathfinder for NDA & NA Entrance Examination National Defence Academy/Naval Academy Conducted by UPSC
by Arihant Experts

3. Chapterwise-Sectionwise Solved Papers NDA & NA by Arihant Experts Paperback

4. Study Package MATHEMATICS NDA & NA (National Defence Academy & Naval Academy) Entrance Exam Paperback – Oct 2015

General Ability 

Listed books contains questions from different topics from the sections covered under General Ability Test like English, General Knowledge, Physics, Chemistry, General Science, Geography, Current Events, Intelligence and Personality, History, Freedom Movement, etc. These books have well-explained theory and also sufficient exercise of solved and unsolved questions for better practice.
1. Compendium General Knowledge 2018 with Latest Facts & Data 
By Kumar Sundram
2. GENERAL KNOWLEDGE 2018 FOR USEFUL FOR SSC NDA IAS PCS AND OTHER EXAM 
By RAJAT WASAN

Previous year question papers

1. Chapterwise-Section wise Solved Papers NDA & NA (Mathematics/English/General Ability) with Explanatory Solutions
By Experts Compilation
2. Chapterwise – Sectionwise Solved Papers NDA & NA (Mathematics/English/General Ability) with Explanatory Solutions
by Arihant Experts

Good luck.