A complete Radio electronics guide

I want to learn all the basics about making a simple radio project.

The project is simple... One transmitting device (which only sends out analog signals of some decent frequency.. say 50MHz) and one receiving device which will have an LED and it will light up only when it receives the signal that is produced by the transmitter.

The project is simple.. I wish to learn everything from scratch and implement it using discrete semiconductor components (No not IC's)

I have searched most part in the internet and almost all of them just show only finalized circuit and thus there is no learning process involved.. I wish to learn the entire electronics/physics behind it as I implement it.. Any Book/link will will do...