Daemon - AI, AR (or MR), 3D printing, crowdsourcing, this book brings them and more together in a facinating manner. http://www.goodreads.com/book/show/6665847-daemon and the second in the series http://www.goodreads.com/book/show/8488830-freedom
Just finished Daemon and about to start Freedom. Great read, and it's amazing how quickly it ramps up near the end! I hadn't been hooked to a book like that since "The Moon is a Harsh Mistress" and "Dune"
It's not a sequel but has some common threads.