Over Sea, Under Stone by Susan Cooper

This is the first book in the Dark is Rising series.  This story is part of a long line of King Author myths. Simon, Jane, and Barney discover an ancient map that leads to the holy grail.  This is a story of their adventures.  I enjoyed the story but found the character actions formulaic.  Most of the time that the children ended up in danger it you could see it coming because of some stupid action on their part.  It lacked the element of surprise that I enjoy in a story.  I have not decided if I will continue the books in the series or not.