Note: these are not books that I am recommending personally, because I haven't read any of them yet. They are instead books that other people at the con talked about sufficiently enthusiastically that I now want to read them. Some of them are on my (now much larger) to-read pile, either in dead tree form or electronically; some aren't yet.
First up: two people I know had book launch parties at the con! David L. Clements released his collection of short stories, 'Disturbed Universes' (from NewCon Press); and Siobhan McVeigh has a story in the collection 'Existence is Elsewhere' from Elsewhen Press (scroll right down for buying options). I heard various of the authors reading extracts from their stories in this book at the launch and they all sounded great.
The rest of my recs are from the Feminist Fantasy panel:
- Jo Walton 'Lifelode' (annoyingly, it seems to be out of print, and expensive second-hand)
- The Chinese myth series Dream of Red Mansions
- Elizabeth Gouge (note that not all of her books are fantasy)
- Octavia Butler 'The Wild Sea'
- Someone mentioned the Green Knowe series of children's books, which are sort-of historical fantasy. I read them as a child (a long time ago now) but am now minded to have a look for them the next time I'm in the library and see how they've held up.
- Tanith Lee
- Lois McMaster Bujold 'Paladin of Souls' -- I have read this one and it is GREAT. Very strongly recommended.
- Kate Elliott -- both fiction and non-fiction. (Just looked at her post about her own books/series and am now wondering how I missed all of this for this long. Looks great!)
- Mary Stewart -- Merlin trilogy
- Andre Norton 'Year of the Unicorn'. (I should probably have read this already...) (but I haven't, so.)
To enlarge your (my) reading list further, E. G. Cosh (who was on a panel with me and is v cool) has a recs post too.