- Over Sea, Under Stone
- The Dark is Rising
- The Grey King
- Silver on the Tree
I say the series is loosely connected to Arthurian myth because it's set mostly in the ''present time'' of the late 1960's and early 1970's, when it was written. The imagery, ideas, and even names from Arthurian myth and other British folklore get used extensively, and Merlin is even a main character in the series. But for the most part the Arthurian mythos is used to let you know how important the different artifacts are, assuming you'll be familiar with the names. And I think that was the biggest problem I had when I was a kid reading them the first time. I knew a little bit about Arthur, and I liked the stories I could get my hands on, but these were the highly filtered, sanitized for kids versions so I didn't understand the references to various objects or other legends. And so I think if you're unfamiliar with a good chunk of the Arthurian mythos, you're going to be a little confused by some of the objects and names.
The first book, Over Sea, Under Stone, is definitely different from the other books in the series and has far less magic than the other four. It's been described more like a mystery adventure than a fantasy novel, so it's an example of early installment weirdness. The rest of the books go much deeper into the struggle between the Old Ones of the Light and the Lords of Darkness who are trying to influence the world. How their magic is done is only vaguely explained at best, with Will Stanton the last of the Old Ones reading a book that teaches him everything he needs to know about magic. There are some references to the Old Magic, the High Magic, and the Wild Magic and different ways that magic can be done, but for the most part it's fairly unexplained.
The Old Ones, and the Lords of Darkness, seem mostly able to influence time through magic. They're capable of going outside of time or, when conditions are right, stepping from one time to another. This causes some of the weirdness of the books because a lot of the really magical stuff happens outside of regular time in a Britain that is and yet isn't. The struggle between the Light and the Dark is also an attempt to either fulfill or thwart a prophecy that the Light will finally triumph, and the conflict takes place through time and yet out of time as well.
Basically the Dark is blamed for a lot of bad things happening to Britain, such as the invasions by the Angles, Saxons, Danes, Jutes, and Normans, as well as other times when the Dark has been able to exert influence. However the rules are that neither Light nor Dark is able to completely destroy the other so the Light is always to create a bastion of hope to ensure that humanity will continue and the Dark will not prevail. Until of course the final conflict which takes place in the 1970's when all the artifacts are found, rather quickly as a matter of fact, and the Light is able to use the artifacts to banish the Dark forever from the world. Granted, this does not banish the darkness in men's hearts, but it provides hope for the world to endure.
Overall I have mixed feelings about the series. On the one hand it shows enormous creativity on Cooper's part, such as utilizing magic to time travel which I don't see very often, and the series has a pretty good message that despite the bad influences such as greed, cruelty, and arrogance if we fight to keep hope alive we can always drive back the darkness. On the other hand Cooper doesn't explain a lot of stuff in the book and it left me, even as an adult, sort of confused more than anything. If you don't know the Arthurian references you're definitely going to be lost, and even then there's a lot that simply isn't explained. It implies deep ideas for world-building but we just don't get to see how complex the story could have been. It certainly doesn't get bogged down in exposition so it keeps a fairly brisk pace, but I feel like that might ultimately be to the book's detriment.
Despite all of this, the books are certainly interesting and I would say worth your time to check out. It definitely feels different from any other fantasy books out there which makes it stand out when so many things can sort of blend in with the rest of the competition.