Final answer:
The Vedas, which include the Rigveda, Samaveda, Yajurveda, and Atharvaveda, are the sacred Hindu writings. They are supplemented by texts like the Upanishads, Purānas, Mahābhārata, Rāmāyana, and the Bhagavad Gitā.
Step-by-step explanation:
The set of books that contains sacred Hindu writings is known as the Vedas. These ancient texts are written primarily in Sanskrit and include the Rigveda, Samaveda, Yajurveda, and Atharvaveda. They provide a comprehensive look at early Indian philosophy, hymns, and rituals that defined the Vedic period. Additionally, other significant texts in Hinduism are the Upanishads, which are philosophical commentaries on the Vedas, the Purānas which detail Hindu mythology, and the two great epics - Mahābhārata and Rāmāyana. The Bhagavad Gitā, found within the Mahābhārata, encapsulates the spiritual teachings of the Vedas and is often considered a summary of its philosophical concepts.