Thesis about PLC (power Line communications)

HI. I'm a student of electronic enginnering in the university of Quindio, Armenia, Colombia. I need to model the powerline by measuring, but I don't know any kind of models to use with it. Someone knows what can I do????

I would also like to know if someone can get me the ebooks:
-K. Dostert, Powerline Communications. Englewood Cliffs, NJ: Prentice
Hall, 2001.
-Hassan K. Khalil, Nonlinear Systems, Prentice Hall, 2002

that ebooks can help me to develop my thesis.

Thanks. regards.

Jesus