Iphone5 needs software to read books, but you can choose iBook, the software that comes with your phone, or try third-party software. If you choose to use e-books on your computer, you need to use the reader software. The operation steps of using the iBook that comes with the mobile phone software are as follows:

Open the iBook application.

Choose the book you want to read.

Click Get to get it.

When you are finished, click Read.