I had read Caro's book on tells years ago. The book was old then!...and the photos were from the 70's.
I recently viewed the DVD. Much better.
But.....tells are over-rated. It doesn't teach poker.
I was impressed with a DVD of Tom McEvoy. It's on loan to a friend and I can't think of the title. But he takes you through a single table tournament and tells what should be done and why. Very educational.
Sklansky's books are sitting besides my computer. He recently came out with a DVD. If I was new to the game, his DVD would be #1 on my list.