The Bṛhad-yogi-yājñavalkya is a large work in Sanskrit comprising 930 verses spread over 12 chapters. The subject matter is a combination of some topics of dharmaśāstras and of others dealt with in works on yoga and mantras.
The work begins with the questions posed by some sages to Yogīśvara of Mithilā.
The following is a brief summary of the twelve chapters:
The work quotes a large number of verses from the Manusmṛti and contains many verses of the Bhagavadgītā also. Several passages from the Upaniṣads too are found in it.
One interesting statement that this book makes is that Gārgī was the wife of Yājñavalkya. This however is not correct as we find from the more authoritative scripture, viz., the Bṛhadāraṇyaka Upaniṣad.