https://en.wikipedia.org/wiki/Diffusion_of_innovations
https://www.amazon.com/Diffusion-Innovations-5th-Everett-Rog...
This is the seminal book on marketing, social cognition, innovation, etc. It blew my mind. Mostly that we've known this stuff for so long, but apparently must keep rediscovering it.
Nonetheless, I think I'll buy this book and read it, just to see if there's any kernel of novel insight there. After all, for an innovator / entrepreneur, this is one of the most crucial issues out there.
[1]: https://www.amazon.com/Crossing-Chasm-Marketing-High-Tech-Ma...
[2]: https://www.amazon.com/Diffusion-Innovations-5th-Everett-Rog...
I also recommend these few books as a good starting point:
Network Science: Theory and Applications[2]
Linked: How Everything Is Connected to Everything Else and What It Means[3]
Six Degrees: The Science of a Connected Age[4]
The Wisdom of Crowds[5]
Nexus: Small Worlds and the Groundbreaking Science of Networks[6]
Diffusion of Innovations[7]
Of course - being that Network Science is a multidisciplinary field, that touches a lot of other areas - it can be hard to get a handle on what to study. But those few books - between them - cover a lot of the basics and would give somebody who's interested in this stuff enough background to figure out where to start digging deeper.
For a little bit more on the technical side, a couple of good resources at:
Introductory Graph Theory[8]
Introduction to Graph Theory[9]
Algorithms in Java: Part 5 - Graph Algorithms[10]
[1]: http://en.wikipedia.org/wiki/Network_theory
[2]: http://www.amazon.com/Network-Science-Applications-Ted-Lewis...
[3]: http://www.amazon.com/Linked-Everything-Connected-Else-Means...
[4]: http://www.amazon.com/Six-Degrees-Science-Connected-Edition/...
[5]: http://www.amazon.com/The-Wisdom-Crowds-James-Surowiecki/dp/...
[6]: http://www.amazon.com/Nexus-Worlds-Groundbreaking-Science-Ne...
[7]: http://www.amazon.com/Diffusion-Innovations-5th-Everett-Roge...
[8]: http://www.amazon.com/Introductory-Graph-Theory-Gary-Chartra...
[9]: http://www.amazon.com/Introduction-Graph-Theory-Dover-Mathem...
[10]: http://www.amazon.com/Algorithms-Java-Part-Graph-Pt-5/dp/020...