This book is probably one of the best out there to dive into the world or Arthurian Romances. Harrison's translation is easy to understand, and provides helpful endnotes for much of the historical context. The plot is exciting, and the story progresses smoothly. Although the introduction by Helen Cooper is very informative about the author and subject of the novel, it also provides interpretations of the story itself. I would recommend that those who are unfamiliar with the story to take Cooper's advice and not read it, for it will give away much of the plot, which is rather intricate.
The novel starts out in King Arthur's court, around Christmas time. An unusual visitor arrives, in the form of a giant knight, who as the title implies, is green. He makes a challenge that is met by Sir Gawain, the king's nephew. After a short display, he finds out that he will ultimately have to confront the knight a year later to receive his deathblow. Thus, the story begins, as Gawain sets out on his voyage, to not only find the Green Knight, but also the hero in himself.
Although not too long, the text is very rich. It is full of subliminal messages, which create plots of their own. However, it can still be enjoyed even when taken literally, thanks to the clear writing of Harrison, and to the imagination of the original author.
At less than ten dollars, the book is an excellent value. Although a casual reader would get enjoyment from one reading, further readings would almost certainly bring out new themes and revelations to those more familiar with Arthurian romances, making this a must for any Arthurian enthusiast.