John Bellairs’ The Face In the Frost is a great short fantasy novel.
If you’re willing to consider kids’ books (that are still enjoyable by adults), that makes it easier, as we can recommend books like C.S. Lewis’s Chronicles of Narnia and Lloyd Alexander’s Chronicles of Prydain.
Is it worth getting if I already have a copy of the 1970s BEST OF KUTTNER volume?
It seems to have 500 more pages and 20 more stories in it, so if it’s not too expensive it looks like it’s worth getting as well.
Here’s the contents of each:
http://www.isfdb.org/cgi-bin/pl.cgi?270348
http://www.isfdb.org/cgi-bin/pl.cgi?35798
I’d say so, since Two-Handed Engine has 37 stories as opposed to the 17 stories in The Best of Kuttner.
Charlie and the Chocolate Factory by Roald Dahl.
The Amulet of Samarkand by Jonathan Stroud.
This one’s obvious, but no one’s mentioned it: The Hobbit by J. R. R. Tolkien.
Oh.
Well, then.
There’s a great satirical fantasy novel that was written by the guy who wears my shoes and sits at my desk every day, available here, in paperback and ebook. Great for Game of Thrones fans!
I only have one off the top of my head, and it’s very good but not as good (IMO) as the others I recommended: it’s Sorcerer of the Wildeeps. It’s set in a place vaguely like northern Africa, definitely a fantasy kingdom kind of vibe with swords and caravans and such. Characters largely talk like gangsters from The Wire, and there’s some definite callback to Zelazny’s brand of world-crossing fantasy. It’s a cool mix, not like anything I’ve seen before. (Oh, and I just checked, it’s 224 pages, so it barely misses the arbitrary cutoff I set :)).
One little-known fact. Kuttner wrote all the Gallagher robot stories by himself. Moore said so.
Xanth stuff is short, but can only be considered good if you are really into puns. Especially after the first 5 or 6.
I can’t imagine her writing stories about a gleeful drunk. 
“Excuse me. I rage.”