To download a novel for Apple's mobile phone, you need to import the novel file into the documents folder of the corresponding application. So you can find it in the application.

Download a reading software, and you can search documents in various formats by yourself.

Txt format is also encoded. Usually, you can open a file by saving it as anst.

Another method is to connect the mobile phone with the computer, first move the e-book to the desktop, open the e-book "file"-"save as" on the computer, and modify the storage directory-the folder where you store the e-book in the mobile phone.