[Tarana]

mobama, I agree that perhaps your choice of non-fiction does not lend itself well to audiobooks. As to your opinion of narrators, I think you don't have enough experience of professional narrators. The biggest problem is that the narration, even if well done, may not fit your internal voice for the character.

I do agree that text-to-speech machine narration is difficult, but some can adapt to it readily. I have no problem with it after 3-4 chapters. Since, unfortunately, this may be the only way I will be able to read books not available in audio form in a few years, I typically listen to TTS while washing dishes. Regular practice makes a difference.

I was a narrator for college science textbooks while I was in college and virtually everybody wanted me to do their book - not only could I pronounce everything, but many of the listeners reported that they could tell when I was suddenly intrigued by something I was reading. Tables, asides and footnotes - very difficult to do in a narration.