Out — at long last! — in audio format: The Age of Ra. Published by W.F. Howes and available via Amazon, Audible, and Audiobooks.com (as well as other outlets, I’m sure), the book is read excellently by Andy Cresswell.
The next three Pantheon novels (Zeus, Odin, Aztec) will be released on audio over the coming months, so keep an eye out for them.