Books not shown in Files app

[Paul9]

I tried to mail a book ( .epub) to a friend. Book has been bought via online bookstore (not Apple). The epub file however is not shown when I try to attach it to a message. Also a file browser does not show the file, while in the Books app it is shown and can be opened. Please advise.

 

[Jupiter7]

I tried to mail a book ( .epub) to a friend. Book has been bought via online bookstore (not Apple). The epub file however is not shown when I try to attach it to a message. Also a file browser does not show the file, while in the Books app it is shown and can be opened. Please advise.

It might be subject to copyright restrictions.

 

[Paul9]

No. copyright is not an issue. I also tried a third party file app. Same result.