SYNC book from Steven Strogatz is great. For all interested in the misteries of synchronization.
A review of all aspects related to sync: synchronization in biology, physics, sociology …. how it looks so normal and how difficult it is really to understand.
At the end gives an overview of the small-world networks, which owed much of its importance to his own work. He tells how ubiquitous are these networks in natural processes and how they improve in general synchronization.