I have all of Christine Feehan's Dark Series books in paperback, and have just finished purchasing all of them in Kindle format. I love her stories of the Carpathian Warriors who find their lifemates, and at once their world is in vivid color, where once it was shades of grey. Each plot is different, although the premise is the same throughout the series: Carpathian Warrior meets lifemate; sees in color; binds their souls, and then go off to fight the "undead". Undead are Carpathian Warriors who have lost their hopes of finding a lifemate, and have turned into nosferatu preying on human and Carpathian alike.
The book was awesome. It had everything anyone could need from a book. Action, love, darkness, betrayal, mystery, romance, and characters that you can fall in love with. To be able to see the profession of the characters from the beginning of the book to the end was a delight.
I highly recommend all of her series... you won't be disappointed!