I'm not a huge fan of Sci-Fi, but I'm reading House Atreides by Brian Herbert and Kevin J Anderson. A lot of my friends have said that the Dune series goes downhill after the first three but I am still utterly immersed in the story/stories. Frank Herbert and his son (and those who helped right the later books) were geniuses. I'm also reading the Ender's series finally (after reading and re-reading Ender's Game tens of times growing up) but I'm more focusing on the Dune series at the moment.