I'm a pretty huge fan of the Transhuman Space series of rpg books. It's a mostly hard science fiction setting with lots of biotechnology, terraforming, and artificial intelligence. There is no faster than light travel, psychic powers, or aliens. One of the things I love about it the most is the way it presents a wide variety of future viewpoints, it doesn't try to thrust the values of the game creator onto you. I would highly suggest it just for reading value, but if you can find people to play with that's awesome (I'm in a game right now, its pretty dang sweet.