The Dark is Rising by Susan Cooper is the second book in "The Dark is Rising Sequence" of fantasy books. On his 11th birthday, Will Stanton, the seventh son of a seventh son, discovers that he is the last of the Old Ones who protect the world from the dark forces of evil. It is his task to find the six magical Signs that must be merged to help the Old Ones in the coming final battle between Dark and Light. But time is short for the season of darkness has started with the midwinter, and the dark forces are strengthening daily using all of their power to keep him from completing his task.
The Dark is Rising is an excellent follow-up to Over Sea, Under Stone with plenty of action and a lot more supernatural/fantasy elements that bring the battle between light and dark out into the foreground for this book. I thoroughly enjoyed it, and Jessie devoured it the moment I finished. I would recommend it for ages 11 and up especially for those who enjoy a good fantasy read. I'm looking forward to reading the remainder of the series. (Jessie wants me to hurry up and get started, so she can read them as well.) Great book!