Hello student

hope you are doing well and safe. With reference to your query,  I would glad inform you that their are many decent which you can follow for preparation of SAT NTSE EXAM. Following are some names of them:-

Study Package for NTSE, 5e Paperback – 10 by Stalin Malhotra

Practice Test Papers for NTSE Class X 1st Edition by McGraw Hill Education

comprehensive Manual for NTSE for class X by Abhijit Guha, N.D. Arora,

Following is the link for reference:-

https://school.careers360.com/articles/best-books-for-ntse

Hope you found this answer informative. Best wishes for your future