The Avesta .pdf -

The Avesta serves as the foundational, multi-part scriptural collection of Zoroastrianism, comprising hymns, rituals, and laws composed in the ancient Avestan language. Key components include the Gathas, which are hymns attributed directly to Zoroaster, along with the Yasna and the devotional Yashts. For accessing digital versions, Avesta.org is considered a reliable resource for categorized texts, often featuring translations from L.H. Mills or James Darmesteter.