The Enchanted Cup is a novel of Tristan and Isolde written solely as historical fiction. If you're looking at the page for this obscure and out of print novel I'm just going to assume you know the plot of the story and get strait to the mechanics of the book.
The historical aspect of this book, as told in the handy little book-of-the-month-club review that was inside the front cover, is said to be about the Britain of crumbling Roman strongholds, endless fury from the sea, thatched circular huts where you sleep where you eat, and the shining crumbling city of Camelot where the warlord Arthur sits and broods. Sounds nice right? Well, yea it would be nice if the book was like that, but it wasn't. While this was probably the most accurate historically of the novels about Tristan and Isolde that I've read, it also had a kind of odd air in the landscapes. I couldn't get a clear picture of anything. I could visualize a land over washed with sun and wind were squinting was necessary for seeing, but other than that, nada. No crumbling Roman cities. No brooding King Arthur.
Other than this book focuses solely on Tristan and his feelings. It is basically a psychological profile of him. Kind of boring, because there is never another perspective and because Isolde basically doesn't exists in this book, and never really says anything well, I got bored. Also the love story is never explained, and like many novels of this tale, King Mark (Isolde's husband) was made into a doddering jealous and evil fool.
And the ending happens in half a page. Everything is going along, and all of a sudden everyone dies.
Basically, I wouldn't read this again, and can't say I'd recommend it. My search for the perfect Tristan and Isolde novel lives on.