No. Why not? Our books are not casual or fast reading. They are food for the consciousness that should be ingested slowly, with much reflection. Audio books do not encourage comprehension, but speed you through the content.
Furthermore, the narrator changes the book; the listener is influenced by the narrator's personality and subtle qualities in their voice. More importantly, the narrator interprets the content to read it aloud, and that interpretation depends upon their level of Being. We prefer to have the content interpreted by our own consciousness, our own Being, thus we prefer to read it ourselves.
And yes, we offer audio lectures, but that is different. The audio lectures were made to help you understand the books. The books are tools for meditation.