The Ill-Made Mute truly surprised me, it was a fantastic book with perfect pace, diction and style. This meant that the second had to live up to so much. Unfortunately, it doesn't.
That doesn't mean The Lady of the Sorrows is bad by any means, yet there exists a contrast within the book, notably between the first half, which is slow, bland and will often have you wondering why Cecilia dismisses the plot entirely, as the series seemingly discards its background that is steeped in Celtic folklore and morphs into something akin to Jane Austen's Emma.
After 300, the book gets far better as the plot finally picks up again and moves from the urban environments to less populated areas. The real reason why it picks up so greatly in the second half is because Ms. Dart-Thornton is obviously far better at creating places and history than people. Imrhien-Rohain, the main character, is the one exception, but old characters that return are quickly discarded and new characters are stock at best and are inadequately fleshed out.
The eventual twists that occur in the final 200 pages are excellent, but even this doesn't save The Lady of the Sorrows from a flat ending.
I would still recommend this, but it simply can't stand up against the first book in the Bitterbynde Trilogy.