The Hindu holy books are known as the Vedas. The Vedas are a collection of ancient Sanskrit texts that are considered to be the oldest scriptures in Hinduism. They contain hymns, prayers, and rituals that are used in Hindu worship. The Vedas are divided into four parts: the Rigveda, Yajurveda, Samaveda, and Atharvaveda. Each part contains different types of texts, such as hymns, prayers, and rituals. The Vedas are an important part of Hindu culture and are still studied and practiced today.