how to permanently remove a title from iBooks?

I received a free ebook from a fellow author, and downloaded it to iBooks on my iPad.

I have tried to remove it, but it keeps coming back. How can I get rid of it permanently?

Unlike other iBook titles, this one shows a circular download feature after the title.

I've tried moving it, successfully, and have deleted both the download and the title, but it keeps reappearing.

Any helpful suggestions will be appreciated.