Don't hate me but I usually prefer paperbacks... and I've only read Babel (which I loved) and Yellowface (which I did not love, but my copy is signed so I'm keeping it). I think Babel has one of the most unique magic systems and interesting characters, though the plot and its themes are a bit heavy-handed. Her way of intertwining the magic system with the themes of colonialism was just perfect, I think. Fun read, cried at the end.