The World Bank in the USA sends a wide variety of educational books for distribution to school libraries and NGOs. Visit the Ratna Nidhi Charitable Trust site to know more.
Ratna Nidhi Charitable Trust
16 A, Khetwadi, 12th Lane, Opp. Earth View Bldg, opp. Pawri School, Khetwadi, Grant Road, Mumbai, Maharashtra, India 400004
http://www.ratnanidhi.org/Category/book-donation