- The Paradise War (1991)
- The Silver Hand (1992)
- The Endless Knot (1993)
The trilogy follows the story of Lewis Gillies, an American student at Oxford, who stumbles into the Celtic Otherworld of Albion.
The series has been illustrated by a number of artists including Rodney Matthews, Daniel Horne, Anne Yvonne Gilbert, and Peter Holt.
- Action Girl: Scatha, the trainer of warriors on Ynys Sci, is a skilled fighter herself and joins the quest to rescue her daughter.
- Affectionate Nickname: Nettles for Professor Nettleton.
- An Arm and a Leg: Llew has his hand cut off at the start of the second book to prevent him from claiming the kingship, since no blemished man may be king. He gains a Silver Hand to replace it.
- Appeal to Force: What Meldron's approach to kingship consists of. When Tegid challenges his claims to the throne by anointing Llew king by the tradition of Bardic rite, he hacks off Llew's hand, blinds Tegid and sets them adrift to die.
- Back for the Dead: Nettles returns in the Foul Land, after his departure at the start of The Endless Knot only to be killed off-screen.
- Big Bad: Simon Rawnson/Siawan Hy/The Brazen Man is the ultimate villain of the series. Starting as Lewis' cynical friend, he becomes increasingly power-hungry after his arrival in Albion and urges on Meldron's atrocities begining with killing King Meldryn than conquering the rest of Albion. After his defeat in the second book, he reinvents himself as the Brazen Man and uses his father's company to exploit the Otherworld's resources, enslaving the inhabitants. He follows up by kidnapping Llew's wife, Goewyn, and finally kills Llew.
- Bittersweet Ending: Llew sacrifices himself to defeat Simon and cleanse the Foul Land. As his body was placed in the same mound he emerged from, he returns to the modern world alive but is forever separated from Goewyn and his friends in Albion.
- Character Narrator: Lewis/Llew narrates the first and third books while Tegid narrates the second.
- The Cynic: Simon at the start of the series. He spends quite a bit of the trip to Scotland harping on the problems of modern Britain. This becomes a problem when he takes his slanted views into the more idealistic Albion.
- Culture Clash: The first book has a fair bit of this between Lewis' modern viewpoint and the Celtic values of Albion.
- Damsel in Distress: Goewyn is kidnapped in the third book and her rescue is the driving goal behind its narration.
- Disc-One Final Boss: Lord Nudd for The Paradise War. He serves as the major threat for that book, but is defeated at the end and Siawan ultimately is the true Big Bad of the series.
- The Evil Prince: Meldron who kills his father Meldryn and usurps the kingship against the dictates of tradition. He goes on to massacre villages.
- Evil Former Friend: Simon is this for Lewis, the two starting as post-graduate roommate friends who become alienated in Albion with Simon ultimately becoming the Big Bad.
- Fisher King: The King is linked to the health of the land. Just as Meldron's illegitimate kingship poisons the land and causes it to sicken, Llew's rightful ascension to kingship heals and restores it.
- The Good King: Meldryn Mawr, the wise and generous ruler of Prydain who is widely beloved.
- The Hero Dies: Simon ultimately kills Llew. However due to his status as an outsider, when his body is placed in the mound he awakens alive in his own world.
- The Man Behind the Man: Siawan is the one really pulling Meldron's strings, by giving the idea that kingship should be dependent on descent rather than election and egging on his atrocities such as massacring the students at Ynys Sci and conquering the other kingdoms.
- Off with His Head!: Professor Nettleton is beheaded by the Brazen Man who sends it back to Llew in a bag.
- Pet the Dog: Siawan Hy giving Lewis the credit for killing the enemy champion, enabling him to find a place in Albion. Considering everything else he does, it's a surprisingly decent act.
- Shout-Out: A number to Irish and Welsh mythology.
- Albion is divided into Prydain, Caledon, and Llogres, all archaic names for those parts of Britain.
- Llew of the Silver Hand references the figures of Lludd Llaw Eraint and Lleu Llaw Gyffes of Welsh mytholgy.
- Scatha the trainer of heroes who lives on Ynys Sci, is based on Scáthach from the Ulster Cycle, the teacher of Cú Chulainn, who lived on the Island of Skye.
- Someone to Remember Him By: Goewyn is pregnant with Llew's child after his death, leaving her with a remembrance.
- Took a Level in Badass: Lewis Gillies goes from a naive graduate student to a skilled warrior through his years of training at Ynys Sci.
- Trapped in Another World: Both Lewis Gillies and Simon Rawnson wind up falling into the Celtic Otherworld of Albion from modern Britain.
- We Used to Be Friends: Lampshaded by a bitter Llew, who is aghast at how far Simon has fallen from the friend he once knew. As Tegid notes he is no longer that man.
