Here are the list few NCERT books which you can download for free. I hope this will help you in better preparation for different examinations (UPSC and related exams).
These books are provided in pdf format. (Links will be added soon, 1-2 days)
NCERT BOOKS CLASS 6
SCIENCE
MATHEMATICS
HISTORY
GEOGRAPHY
CIVICS
NCERT BOOKS CLASS 7
SCIENCE
MATHEMATICS
HISTORY
GEOGRAPHY
CIVICS
NCERT CLASS 8
SCIENCE
MATHEMATICS
HISTORY
GEOGRAPHY
CIVICS