If you want to convert text books to audio books, you can try TTS Batch Converter.
For example, we have a book “Pride and Prejudice”, we want to convert it to an audio book.
For avoiding too big audio file (.mp3 or .wav), we split the book into chapters.
And then we convert these chapters to audio files.
Audio files are like these:
TTS Batch Converter without the manual work
For batch jobs, large files and scheduling use the TTS Batch Converter converter — an offline desktop app for Windows, Linux and macOS. Free trial.