While Sony offers more free books than other companies, the average price in the Sony eBook store is generally higher than the standard $9.99 that Barnes &Noble and Amazon are charging.

• 尽管索尼提供的免费图书比其他公司要多，但是索尼电子书店中图书的平均价格要高于巴诺书店和亚马逊收取的9.；99美元的标准价格。