The difference between Amazon e-books bought with money and free ones lies in different fees and different surface labels.

1. The sample book is a trial reading chapter and can be read for free.

2. The purchased books can only be read after payment.

3. The words "sample chapter" will be displayed in the upper right corner of the cover of the sample book.

4. The percentage of purchased books displayed in the upper right corner of the cover is new books or read.

4. Because the sample book is a trial reading chapter, it has less content and occupies less space.

5. The book purchased is a full version, which occupies a large space.