So, as a special treat this Halloween, BBC 4 put on a one-hour radioplay adaptation of Hope Mirrees' much admired but little read 1924 novel LUD-IN-THE-MIST. Neil Gaiman, a longtime advocate of the book, appeared as Duke Aubrey, a sinister figure who is essentially the King of Faerie: this essentially requires Gaiman laugh menacingly from time to time, which he pulls off quite well.
Listening to this radioplay is no substitute for reading the book, but it's a great refresher if you're like me and it's been a long time since you've read the original. And for those who have never read the book it offers them a glimpse of what they've been missing.
Now having heard this, I cdn't say whether her story is better suited to audioplay or film adaptation, but I'd like to have the chance of comparing the two.
P.S.: The next day after the Lud-in-the-Mist, the BBC broadcast another one-hour radioplay of another work from 1924: LOLLY WILLOWS by Sylvia Townsend Warner Townsend. A very different kind of story --in fact, the case cd be made that it's not a fantasy at all* --but also very good. I know it's made me want to seek out the original. Recommended.
*i.e. I think it fits in Todorov's category of The Fantastique