Improving English

1. Reader's Digest WORD POWER - Peter Funk
2. Reader's Digest SUPER WORD POWER - Peter Funk
3. Word Power Made Easy - Norman Lewis
4. Word Power from the Reader's Digest - RDI Print & Publishing Pvt. Ltd. - Bombay.
5. Word Power 2 from the Reader's Digest - RDI Print & Publishing Pvt. Ltd. - Bombay
6. New Guide to Word Power - Norman Lewis
7. The Elements of Style - William Strunk Jr. and E.B. White
8. In a Word - Margaret S. Ernst and James Thurber