This is one of my favorite books. I've had a print copy for years. I had hoped to have this soft copy to carry with me. However, there are far too many typos and wrong words and phrases for the book to be enjoyable. As many as 1 every other page. I brought these serious errors to the attention of Apple customer service. They did not care, nor will they refund my purchase. I'm sure Harry Turtledove would be upset to know Apple is peddling this extremely poor quality version of his work. Very disappointed. Buyer beware!