Scott Camazine: Self-Organization in Biological Systems: (Princeton Studies in Complexity)
This is another biology book. Nature is expert at building things and communities, so when there seems to be a lesson for human manufacturing in the natural approach. (*****)
John H. Holland: Emergence: From Chaos to Order (Helix Books)
John Holland is the master and is mentioned in Steven Johnson's book. (*****)
Carl Zimmer: Parasite Rex : Inside the Bizarre World of Nature's Most Dangerous Creatures
I meant this to be recreational reading, but it was fascinating. (*****)
Alan Cooper: The Inmates Are Running the Asylum : Why High Tech Products Drive Us Crazy and How to Restore the Sanity (2nd Edition)
I don't think I would read this one cover to cover, but I see why people on the software development side would like it. (***)
Steven Johnson: Emergence: The Connected Lives of Ants, Brains, Cities and Software
This is a good entry-level book on the concept of emergent behavior. (*****)