Greenwitch is by Susan Cooper. The third book in the Dark is Rising sequence. Simon, Jane, and Barney return with their great-uncle Merry to the small town in Cornwall where they first found the grail; which has since been stolen from the British Museum and they now have to find it. The must join forces with another strange young boy named Will Stanton. They must fight the forces of the Dark, get another item of power from the mysterious Greenwitch, and recover the lost grail. Another exciting installment in this fascinating series.
Ratings: 6th grade - 9 out of 10.