Karen Marie Moning's Shadowfever Novel

I just finished Karen Marie Moning's Shadowfever, the last of the Fae series. For those who think of her as a romance novelist, this one has the ingredients with girl meets guy but they antagonize each other with banter and sexual tension. BUT, it is also a fantasy with the Seelie and Unseelie faeries and the main character, MacKayla who travels to Dublin, Ireland to find her sister's killer only to find out that she is a sidhe-seer.   A sidhe-seer can see through the illusions of the Fae.  There are many who want to kill her or use her abilities to find a book, the Sinsar Dubh, a book of dark powers that in the wrong hands could destroy our world and the world of the Fae.  Jericho Barrons, a bookstore owner who is also something else which you find out in the last book of the series, wants the book for his own reasons and then there's a V'lane, a Fae who also wants the book to stop all the Unseelie from crossing the border to our world or so he saids.  The border is fraying and some of the monsters are coming into Dublin hungry. Mac will be tested throughout the series as to whether she has enough strength to see this to the end without getting killed.