Titles available in print as well as audio books narrated by computer-generated voices. While this cannot match the quality of a human narrator, hopefully it will still be helpful, for example to allow listening while driving, as well as to the visually impaired.

(The prices shown are those of the printed book. eBooks and audiobooks are priced in the 9 to 10 Euro/USD/CHF range. The exact price depends on local sales taxes and will be shown during the checkout process.)