Help pull out PDF books from iBooks. In the menu, you can neither share in messages, nor send by mail, only print.
Even sync with iTunes on Windows does not work.
In order to export PDFs from the iBooks application on iOS, you will need an alternative file manager on Mac or Windows. We have already talked about some decent solutions here .
After connecting the iPhone, the program in the corresponding section will see all the downloaded books and allow you to export them to your computer.
Programs are paid, but you can make the necessary manipulations in the demo version.