INTRODUCTION TO HINDUISM
Hinduism is commonly perceived as a polytheistic religion. Indeed, most Hindus would attest to this, by professing belief in multiple Gods. While some Hindus believe in the existence of three gods, some believe in thousands of gods, and some others in thirty three crore i.e. 330 million Gods. However, learned Hindus, who are well versed in their scriptures, insist that a Hindu should believe in and worship only one God.
The word Hindu has geographical significance and was used originally for those people who lived beyond the river Sindhu or the region watered by the river Indus. Some historians say that it was first used by the Persians who came to India through the north western passes of the Himalayas. The word Hindu is no where mentioned in Indian literature or scriptures before the advent of Muslims to India, according to the Encyclopedia of Religion and Ethics. According to Jawaharlal Nehru in the book Discovery of India on page 74-75, he writes that the earliest reference to the word Hindu can be traced to a tantrik of the 8th Century CE, where it means a people and not a follower of a particular religion. The use of the word Hindu in connection with a particular religion is of late occurrence.
Hinduism has been derived from the word Hindu. Hinduism was a name given in English language in the Nineteenth Century by the English people to the multiplicity of the beliefs and faith of the people of the Indus land. According to New Encyclopedia Britannica 20:581. The British writers in 1830 gave the word Hinduism to be used as the common name for all the beliefs of the people of India excluding the Muslims and converted Christians. According to Swami Vivekananda (great reformer of Hinduism) in his book ESSENTIALS OF HINDUISM ON PAGE 6 AND 7 writes that the word HINDU is a misnomer and we shall referred as Vedantist meaning people following the vedas. 
The main Hindu scriptures are:
Vedas, a collection of hymns praising the Vedic gods. Veda means 'knowledge'
There are basically four (4) Vedas - They are-
* Rig-Veda Knowledge of Hymns of Praise
Upanishads- There are about 108 Upanishads. It is Commentary on Vedas.
Aranyaakas- There are about 10 Aranyakas. Aranyaka, ( Sanskrit: “Forest Book”) a later development of the Brahmanas, or expositions of the Vedas, which were composed in India in about 700 BC.
Brahmanas- There are about 10 Brahmanas. Any of several ancient Hindu religious prose texts that explain the relationship of the Vedas to the sacrificial ceremonies.
Ramayana-long epic poems about Rama and Sita
Mahabharata- long epic which includes the Bhagavad Gita
Bhagavad Gita- The Bhagavad Gita occurs in the Bhishma Parva of the Mahabharataand comprises 18 chapters from the 25th through 42nd and consists of 700 verses.
Manusmuriti– The Law book of Hindusim.