You can also visit http://www.prathambooks.org/. Prathombooks is a non-profit organisation works in close contact with the ‘teachersofindia’ group. They publish for quality books for the primary level.The books are very affordable.( Rs 10-Rs 40).you can engage with their initiative in a number of ways. A library with 100 books in a primary school can be purchased at a rate of less than 3000 rupees.Initiative can be taken from Sarba Shiksha Fund,if the fund authorities want to do so.
Prathom books are shortlisted by Google from all over the world for their use of innovation and technology for social change.