[Supernova]

Hey guys, I was looking for some words of wisdom.

Last year, I got bored and during the summer holidays from school, I designed and built my own electric guitar.

This year, I want to build my own amp, even if it's just a kit BUT I want to learn as much as possible about amplifiers as well. ATM I know what sounds good to me, but haven't got a notion about the inside.

Can you guys that are experts on the subject recommend good books/websites/dvds/threads on the design, building and repairing of valve amplifiers?

All responses appreciated