[Linked](https://www.amazon.co.uk/gp/product/0465085733/ref=dbs_a_def_rwt_bibl_vppi_i2) by Albert-laszlo Barabasi
[Six Degrees: The Science of a Connected Age](https://www.amazon.co.uk/Six-Degrees-Science-Connected-Age/dp/0099444968) Duncan Watts
## [Network Theory](https://en.wikipedia.org/wiki/Network_theory)
[Introduction to Network Introduction to Network Theory](https://www.cl.cam.ac.uk/teaching/1011/PrincComm/slides/graph_theory_1-11.pdf)
