I recently reread Steven Johnson's Emergence and was struck by how familar it all seemed, even for a reread. Flipping through the bibliography at the end, I realized why: much of my reading list over the past four years has come directly from those few pages in the back of the book:
The Age of Spiritual Machines by Ray Kurzweil
A Thousand Years of Nonlinear History by Manual De Landa
Guns, Germs, and Steel by Jared Diamond
The Pattern on the Stone by Danny Hillis
How Buildings Learn by Stewart Brand
The Death and Life of Great American Cities by Jane Jacobs
Nonzero by Robert Wright
Since reading the book, I've also heard talks or read articles by other folks mentioned in the bibliography, like Franz De Waal, Eric Bonabeau, Kevin Kelly, James Howard Kunstler, Marvin Minsky, etc. I'd read a few things on the topic before Emergence, but it was really a catalyst for a area of study I didn't quite know I was focusing on until much later.