A Game of Thrones - First in the Song of Ice and Fire series by George R.R. Martin - I'd initially watched the tv series, but knowing what happened made me excited for what was to come next. I loved this. You forget that it's a fantasy book, until the dragons make an appearance. Love that you can't trust anybody and having different chapters following the narrative of different characters helps keep it interesting and keeps you aware of how events affect other people in the book.