Mary's heart sang out with bittersweet joy, and she held back the urge to embrace her twin.

There's a touch of sadness about it but it's incredibly uplifting, reaching a bittersweet joy that only the most spiritual of house achieves.

Oh, Kindan," she cried, in bittersweet joy, "you've given me your watch-wher!

The Entity tasted the bittersweet joy that flooded him.

As it always did, her face lit up when she saw him; even now, the brilliance of her smile stung him inside like some bittersweet joy.

Now, it filled her with bittersweet joy.

He paused, and though he remained outwardly calm, within he felt a bittersweet joy.

To cram a lifetime into the now, suck it dry of the bittersweet joy of being mated.

"There is such bittersweet joy in this."

And while the book's conclusion is a bit tidy, these small flaws do little to diminish the bittersweet joy that comes when finishing a strong novel by a fine writer.