Audio Book is a powerful and practical macOS document-to-audio application, which enables you to convert various types of document file to audio files(aiff, mp3 and m4b format). The application comes with support for over 38 different languages and 50 different voices, including Siri voice.
Working with AudioBook is a breeze: just import PDF, RTF, TXT, HTML, EPUB documents into AudioBook, select the language and voice, and then click on the Convert button. Batch-conversion is supported in Audio Book, and you can also convert individual documents via the contextual menu or through the Convert button.