The Squire's Tale is quite a light treatment of the Arthurian legend, suitable for young readers and an enjoyable -- but very quick -- read for adults too. I've had it on my list for a long time, but I only actually eventually bought it because supposedly the series has a sympathetic Kai, and my dissertation is on the various permutations of Sir Kay.
This one, however, would've been more useful for my Gawain essay. It turns a lot of the stories, even Malory's, to Gawain's advantage, and plays up the idea of him being the Maidens' Knight, and so on. Terence is, as far as I know, a completely invented character, but he's likeable enough for me, particularly because of his devotion to Gawain, which I entirely approve of. I wish there'd been a longer treatment of the story of Ragnelle (though here she is conflated with Lady Florie and called Lady Lorie), but I appreciate Morris' feeling that Malory was rather too hard on Gawain, and his comments on Gawain's earlier character.
There's very little about Kai, but he is at least a character you can sympathise with in his concern for Arthur, with nods back to his literary ancestry in the way he clings to traditions like squires not sitting in their knights' presence.
Overall, it's a very simple story, but that didn't make it unenjoyable.