Well, this is different.

Delores writes:

I am looking for a horror book that was published between 1980-81. It was a paranormal horror book.

It was about a young woman who breaks her engagement and joined a convent under the influence of a demon. When she get to the convent she scare the (sisters) nuns with paranormal activities like levitation, changing thanksgiving dinner into feces, and having sex with imps. In the end, she climbs on the top of a building and pours gas over herself and light a match. She dies but her skin did not burn.

A priest tried to save her but failed. He believed the foul spirit was in her hidden since she was a child of five.

I would really like to find this book and buy it. Hope you can help.

Can anyone help Delores find this book?