How do you know if an ebook has drm?

You can check whether an eBook is DRM protected through free Calibre software.

1.Download and install free Calibre on your computer.

2.launch Calibre and drag and drop the eBook to it.

3.Select and double click the book.

If you can open it, the book will have no DRM. Or an alert window with "DRM" will pop up to tell you that book is protected by DRM.

If the ebook is DRMed, you can try some 3rd party software to remove the DRM. If it's an iBook, you can use TunesKit iBook Copy, if it's other kind of ebook, you can try ePuborsoftware