hey.. transmission lines is an extensive area which is also very interesting..
use ryder for basics.. umesh sinha is also very good.. added to tat a number of applets are available free on the Net to physically view the simulations..
Simon and Waddel have useful books on a wide range of transmission lines. There are lots of applications on the web to help designing various lines. Take a look at Microwaves101 and Polar's Si9000, particularly if you are messing with PCB's.