Would "only books" mean only single books, not series? Because in that case I don't have much, find it difficult to make decent fantasy in a single book, and admittedly based on that don't bother to look for single fantasy novels to see whether I'd be proven wrong... Unless I'd happen to snap one up for free, which was the case with
Dragon of Ash & Stars. Quick review on
blog, or
Goodreads if you prefer. A friend was telling me recently that the author announced working on another "Dragon" book, but I don't see how she could go back to that world (and she also "liked" my review of that one, where I'm saying she shouldn't even have gone where she did with the very end of it, so hmm...). That really is a nice piece, beginning to end of the story, even the final lines from it are too much. But, yes, it just grows step by step along with the protagonist and once you get to the Night of Dragonsong and Fire... Gets me teary-eyed just remembering it. And then it goes even... higher after that.
Series, on the other hand... Witcher books were mentioned, so I'll just +1 to that, Kingkiller as well, so another +1 there... Song of Ice and Fire oddly weren't, except in the negative, but I will say they are great books, 2nd and 3rd especially, 4th and especially 5th mainly being great examples of worldbuilding. They are very low fantasy though, so not sure how much they fit I guess.
Lesser known series I enjoyed, The Black Jewels Trilogy (know it continued after that, but heard it turned rather into a fantasy soap opera and didn't bother, but found the original trilogy awesome, and original too, and it's available in
a single volume too - quick review on
blog and
Goodreads) and
Kingdoms of Thorn and Bone (great first two books, it's rare that praise printed in a book is accurate but "if you are sick to death of fantasy, read The Briar King. Remember why you used to love it." sure struck me as well put - not that I ever was sick of fantasy, but just that great feeling, in both it and Charnel Prince, Blood Knight is a bit weaker, but then Born Queen is... almost too much, author seems to have wanted to just finish the series and there's material for 2-3 books compressed in that one, and the end, at the time I described it as "a whirlwind of action, a chain nightmare, a series of fever dreams which has been building up all along and suddenly explodes in your face, leaving you gaping and grasping at it, trying, perhaps in vain, to come to terms with all that's going on. When it's all over, all too soon, you'll probably still be at least somewhat confused and perhaps, as Mery put it, "feel a better kind of sad"." - quick reviews on blog,
1,
2 (more here than on GR, but also some spoilers),
3,
4, or Goodreads,
1,
2,
3,
4).
On the other hand, there's a series written by a friend where what I want to recommend is the 2nd book (only 2 out so far),
Heiress of Magic, and with very little direct connection between the two, it can be taken as a single book. Fantasy romance, definitely not something I'd normally read, but holy crap that just tears you apart and spits you out. In terms of emotional impact, one of the very best, if not the best, book I ever read... And at the same time, and for the same reasons, not something I want to read ever again. As I put it in the (full-sized) review (
blog or
Goodreads), "I truly don't know whether I can in good conscience recommend this book to anyone, definitely not because I have any misgivings about its quality or value, but just because of this tidal wave of emotion that will slam into you if you choose to read it, taking your breath away and tearing your heart from your body to smash it into jagged cliffs of agony. Because, while the good news is that it's not just about a love triangle, the truth is that it's about souls skinned alive and roasted on a spit. And yours will be too if you read it. You have been warned." Again getting teary eyed just remembering it now, for entirely different reasons than those of Dragon...
Then I don't know if these would fit, so not going into much detail, but back to Keyes,
Age of Unreason (alternate history with fantasy elements... and one hell of an 100-page final battle scene, and another bittersweet but perhaps more bitter than sweet ending). And
The Book of the Short Sun (available as single volume, science fantasy, part of Wolfe's Solar Cycle, best part of it imho, but is the one with more noticeable fantasy elements so of course I'd say so, ymmv).
As for the giveaway... Well, I just like recommending good fantasy :) But looking through my wishlist for games GOG identifies as indies that are under $20 and where no region pays more than base price, as I'd never cause one of those to be purchased (unless it already has been, I mean), there are two, Balrum and Celestian Tales: The Old North (3 if you add CT's Howl of the Ravager DLC). So I'd be in for CT, since I'll wait for the next sale to grab Howl and then likely actually play that in a reasonable amount of time, while I'm still wary of Balrum due to being written in Java, even if I gather it was updated soon after release to be self contained and not install it on the system, as it did at first. On that note, if I do end up winning, feel very much free to wait for the next sale, as CT is available 75% off with some regularity, and was just available like that during the "Japanese" sale now.