@Tamago, you asked for it. First of all, I'm a big fan. Love the themes of his books, particularly the way he puts his finger on how flawed and wonderful humanity is (as a species). The MC, Geralt has a unique perspective and is well placed to observe the best and worst people have to offer (sorry this is vague, trying not to have too many spoilers). They're definitely books for adults. He deals with a lot of complex issues like racism, sexism, sexuality, elitism, violence and so on, in interesting ways, without shying away from anything. That being said, the overriding theme (for me) was one of the all conquering love of family. I suggested The Last Wish because it's a collection of short stories with common themes, which make up a novel. The construction of the narrative is unusual and interesting. Also, it includes the first things he ever wrote about Geralt (the last being nearly 30 years later) and it's probably the best example I can think of in modern fantasy where you can see the writer improve over the course of 300 pages (or so). The first time I read these stories, I found the style (and quality) shifts between the sections extremely interesting. This was actually my main reason for suggesting this one. His novels are of consistently higher quality (imo), but this offers a little insight into the learning curve of a pro, and it's still damn good. @Tamago, if I was to pick something of his for you to read to maybe sway your opinion, I'd suggest a short story called A Little Sacrifice - I think it's a good summation of what he does best, and you won't waste a heap of time on it if you don't like it.