There is available as a free public domain PDF. However, you can find the primary source material (Sanskrit) and scholarly analysis (English) through the following avenues:
She is often depicted as a youthful figure seated on the lap of her consort, Navatman, or sometimes as an elderly woman to emphasize her "bent" nature. Key Scriptural Sources
The primary scripture is often titled the , which outlines the complex rituals, mandalas, and mantras associated with her worship.
The Kubjika Tantra is famous for its "left-hand" (Vamachara) elements, which are later sublimated into internal offerings. An authentic PDF will discuss the use of wine, meat, and sexual fluids, but always framed within a meditative absorption ( samavesha ), not literal consumption for amateurs.
Use the PDF for academic study or bhakti (devotion) only. Do not perform the homa (fire rituals) or japa (mantra repetition) without a qualified Kaula guru. There are living lineages in Varanasi and Kashmir that still transmit this knowledge.