The history of Belvoir castle

The history of Belvoir castle, from the Norman conquest to the nineteenth century: The primary search results indicate that 'The History of Belvoir Castle, from the Norman Conquest to the Nineteenth Century, Etc.' by Irvin Eller was published in 1841. While this text is available in physical formats and digitized scans (like via Barnes & Noble and AbeBooks, which often rely on public domain texts), there is no indication in the searches that an official, modern, unabridged audiobook has been produced and is available on the specified retail platforms (Audible, Google Play Books, Apple Books, Kobo, etc.). Any existing audio format would likely be a user-created reading of the public domain text, not an officially released audiobook product.