the Discworld series is brilliant, especially Night Watch :]
i also love the Witcher series of books. here's a copypasted paragraph or two i wrote to kitty about them:
"...you should check out the witcher books. they're not entirely translated into english yet, but you can find mobi or epub versions of The Last Wish, the Blood of Elves and The Time of Contempt *shifty eyes* you know, around. and there are *tilts head* mm, fairly good fan translations of the other books from polish into english. you can probably skip straight to Blood of Elves and then backtrack later, tbh.
anyways, the reason i think you'd like them is they're dark/sort of low fantasy with a postmodern touch. kind of like a way better shrek with lots of fvcking and swearing and emotion and racism and murder, i guess? also, in addition to the titular witcher, there's a second main character, his adopted daughter, sort of, Ciri, who comes of age over the stories, and is probably one of my favourite characters ever.
oh also you like cosplay right. here's someone cosplaying her and another character