Yes, the scene where Anne makes up the White Lady to save Bradford from the depredations of Royalist forces is so good. She's in such a seemingly powerless position and she's exerting herself to the fullest to save the town, and it seems like it can't possibly work, and then - it works!

The scene is even more powerful because some of Sutcliff's other books are so tragic. You know she's absolutely capable of Going There, so when she doesn't and instead the town is saved (more or less), the relief is real.