Do not say that the Vedas, the Bible and the Koran are false. Those who do not contemplate them are false.
---Shri Guru Granth Sahib(1350)
Hinduism and Sikhism are two of the most powerful religions in India and some other parts of Asia. It can be said that the Sikhism was the most modern branch of Hinduism, though some say that Sikhism is a totally new religion.
The Sikh Gurus were from the Hindu society and over the period of time they created their own doctrines in which only one God, without any form, was agreed upon. The idol worship was totally rejected by the Sikh Gurus and the holy scripture Shri Guru Granth Sahib was accepted as the only guiding Guru after the line of ten human gurus.
In this book you will find how Hinduism and Sikhism are closely related and at the same time somewhat different.