http://www.kschroeder.com/my-books/ventus/free-ebook-version
* Ventus, his first novel, is about a world that turns accidentally alive (think Gaia) via nanotechnology.
* Lady of Mazes turns around how we could use (very advanced) technology to preserve cultures instead of undermining them.
* Permanence is about a star-faring civilization so advanced it doesn't need technology, it is technology, having perfectly evolved itself to its niche.
* The Virga series is set in a wonderfully imaginative zero-gee bubble-of-gas world, heated by an artificial sun --think of it as space with air!
Besides being an SF author, Schroeder is also a professional futurist. I recommend his OSCON 2009 talk,The Rewilding: A Metaphor, as a good introduction to his thinking.