I've searched this extensively, but I couldn't find anything (the only thing I found was this one). I know this question seems to be more of engineering than physics, but I've found some engineering questions in here, so, I'll give a try.
I'd like a book which explains vacuum tubes (their design: diodes, triodes, cathode-ray tubes, klystrons, magnetrons, etc). I do not want a book which teaches how to manufacture circuits with these tubes, I want to know about the tube themselves: especially the physics of how they work. And, most importantly, I do not want books who hide the math. Additional points for high power tubes and microwave tubes (especially high powered microwave tubes! :D). My preference goes for rigorous books.
Well, I'm comfortable with classical electrodynamics at a graduate level, so, it would be nice to have a book that actually would assume this knowledge (I am asking a lot.. I know.... its okay if the book you recommend doesn't meet all the requirements).