The Demon Bride. The Witching Pen, #3

"Two thousand and eleven years after the birth of the Failed One, the Witching Pen will be made manifest on Earth by the Great Shanka Witch of the Old Scrolls. By her hand, the Earth will rumble and shatter, and all dimensions will bleed into one."The true purpose of the Witching Pen has been revealed, and it must be destroyed before an apocalyptic prophecy comes true. There's just one problem - the Pen is indestructible.
As everyone searches for much needed answers, Elena lays down plans for a radical mission to save her mother from the Shanka's shadow world. Meanwhile, Mary has finally discovered who she really is, and what that means for the human race. What Mary doesn't know, is that Gwain has been searching for her for over ten thousand years, and had lost all hope of finding her. Now that he has her, he's faced with an impossible choice: does he save the woman who altered his very existence, or does he sacrifice her to save mankind?Publisher's Notes:This is the third book in a series.
Warning - contains sexual content and some violence.