India is one of those countries where religion is considered very important by its people. Most of the Indian people follow a religion which could either be Hinduism, Sikhism, Buddhism or Jainism together making the Indian religions or religions that originated in India. However, there are other religions of the world that too has significant following namely Christianity and Islam. In fact, there are more Muslims than anywhere else in the world after Indonesia. Here's an interesting ebook about the various religions of India. 

Indian Religions For Kids