1.  NCERT Textbooks for Classes I-XII

2. E-Pathshala NCERT

3. Skill Education - Books and Support Material

4. CBSE Question Bank - Class X

5. CBSE Question Bank - Class XII

6. Additional Practice Questions for Class X and XII

7. DATA ON CYBER CONGRESS

8. Punjabi E-Library

9. Leisure time reading (English)

10. Psychology Class XII

11. Oswal Books (Free Resources)

For free e-books, here are some popular sites where you can download or read them online:

1. *Project Gutenberg*: [gutenberg.org](https://www.gutenberg.org/)

   - Offers over 60,000 free eBooks, including many classic literature titles.

2. *Open Library*: [openlibrary.org](https://openlibrary.org/)

   - An initiative of the Internet Archive, offering millions of books in digital format.

3. *ManyBooks*: [manybooks.net](https://manybooks.net/)

   - Provides access to thousands of free eBooks across various genres.

4. *Google Books*: [books.google.com](https://books.google.com/)

   - Search for "free eBooks" to find a wide range of public domain books.

5. *LibriVox (for audiobooks)*: [librivox.org](https://librivox.org/)

   - Offers free public domain audiobooks read by volunteers.

These platforms have a wide selection of books, including classics, fiction, non-fiction, and more.