NCERT BOOKS ( MATHS & SCIENCE OLYMPIADS ) – https://ncert.nic.in/textbook.php?aemh1=0-13
SPELLBEE PREPARATION HANDBOOK – https://secure.geniuscerebrum.com/wp-content/uploads/2021/12/GC-SpellBee-Olympiad-Handbook.pdf?ref=Direct
EPIC BOOKS – https://kids.getepic.com/
NATIONAL DIGITAL LIBRARY ( INDIA) (PREPARATION FOR OLYMPIADS & EXAMS ) – https://ndl.iitkgp.ac.in/
CLASSES 9-12 – https://openlibrary.org/
CLASSES 6-12 – https://www.gutenberg.org/
NON ACADEMIC READ – https://manybooks.net/
NON ACADEMIC – LIBRARY OF CONGRESS – https://www.loc.gov/